You know Katie Ledecky, Simone Biles, Allyson Felix and the other household names competing in the Summer Olympics.

Before the opening ceremony Friday marks the official start of the Games, get to know the teenage athletes who could medal in Tokyo and contend for titles for years to come.

1. Katie Grimes, 15 

Country: USA

Event: Swimming

About: At the young age of 15, Katie Grimes was the breakout star at the U.S. Olympic Swim trials. She’ll be competing in the women’s 800-meter freestyle in Tokyo alongside highly-decorated Olympian Katie Ledecky. Grimes is the youngest swimmer to make the Olympic team since Ledecky in 2012. Even Ledecky is already singing Grimes’ praises, saying she’s “the future,” and “the now.”

2. Athing Mu, 19

Country: USA

Event: Track and Field

About: Fresh off of breaking the Olympic Trials track record in the 800-meter dash, Athing Mu is being touted as the country’s next great middle-distance runner. Mu, who competed at Texas A&M before turning pro this summer, holds NCAA records for both the 400 meters (49.57) and the 800 meters (1:57.73). In regards to feeling pressure as a running prodigy, Mu says, “I take everything that people say lightly. I don’t let it get to my head.”

19-year-old @athiiing sets the Trials record and punched her ticket to Tokyo! 🎟@usatf | #TrackFieldTrials21 x #TokyoOlympics pic.twitter.com/luuwJoUHnS

— #TokyoOlympics (@NBCOlympics) June 28, 2021

3. Hannah Roberts, 19

Country: USA

Event: Cycling

About: BMX Cycling is making its Olympic debut in Tokyo, and so is Hannah Roberts. Roberts is a highly decorated star on the BMX freestyle circuit. In 2019, she won all three World Cup events in addition to her second world championship. Roberts is a gold-medal favorite in her event in Japan, and she could become the first teenage woman to win an Olympic cycling medal.

4. Hend Zaza, 12

Country: Syria

Event: Table tennis

About: Representing Syria, 12-year-old Hend Zaza is set to be the youngest Olympian in 52 years. She’s also beating the odds: Zaza has been able to participate in only two or three external matches a year due to war. If you haven’t watched table tennis before, Zaza’s stellar talent will make you want to follow this Olympic sport in Tokyo.

5. Torri Huske, 18

Country: USA

Event: Swimming

About: Having just graduated from high school and heading to Stanford next year, Torri Huske managed to break the 100-meter butterfly record twice at the Olympic swimming trials last month. Twenty-four hours after she broke the U.S. record in prelims by .20 seconds, she broke her own record again. Starting off as a “normal little kid who worked hard,” she will now be one of 11 teenagers to compete for the U.S. swimming team in Tokyo.

6.Grace McCallum, 18

Country: USA

Event: Gymnastics

About: Grace McCallum was named to the four-person team representing the U.S. at the Summer Olympics following the national trials in June, an achievement that seemed nearly impossible when she broke her hand earlier in the year. McCallum, who had already competed at the U.S. Classic and the National Championships, finished fourth at the Olympic Trials. The 18-year-old’s specialties include uneven bars and balance beam.

7. Caroline Marks, 19

Country: USA

Event: Surfing

About: Surfing standout Caroline Marks took the world by storm in 2018. In her breakout year, as the youngest surfer ever to qualify for the Women’s Championship Tour, Marks was named Rookie of The Year and finished with a No. 7 world ranking. Now ranked sixth on the Championship Tour, Marks spoke with Just Women’s Sports about her rapid ascension to the top of her sport.

It's not long before 19-year old @Caroline_Marks3 makes her debut on the global stage. Surf fans everywhere are in for a treat.
Video: Swellshotz pic.twitter.com/ulyQ2E9OJ8

— World Surf League (@wsl) July 16, 2021

8. Kokona Hiraki, 12

Country: Japan

Event: Skateboarding

About: At the age of 12, Kokona Hiraki will be one of the host country’s youngest and most admired stars. After ranking fifth at the final Tokyo Olympics qualifier for women’s park skateboarding, Hiraki will now be the youngest Japanese Summer Olympian ever. Her dedication to her craft is next level: After practicing a nosegrind trick over and over again, Hiraki wrote, “You can feel all the things I love about skateboarding through this trick. The unstableness from being just on the front truck on the coping, the sound of grinding, and the satisfaction when you make it.”

9. Nevin Harrison, 19

Country: USA

Event: Canoeing

About: Canoe sprint world champion Nevin Harrison is heading to the Tokyo Olympics with high expectations. In 2019, she became the first American to win a world sprint canoe title by clinching the women’s C1 200-meter event. Harrison is also a strong advocate for women’s canoeing’s inclusion in the Olympics, saying, “I think it’s more important to have every group represented rather than having a lot in just one gender or discipline,” Harrison said.

10. Sunisa Lee, 18

Country: USA

Event: Gymnastics

About: After coping with family illness, COVID-19 related deaths, and injury, Sunisa Lee claimed a coveted spot on the U.S. women’s gymnastics team by finishing in the top two at the Olympic trials. “It’s the unparalleled mental strength that she has shown during the most difficult time of her life that makes her the person she is,” said 2008 All-Around champion Nastia Liukin. Lee, whose parents emigrated from Laos, will be the first-ever Hmong American Olympic gymnast. While she’s an incredible all-around talent, she’s especially known for her bar routine.

11. Sky Brown, 13

Country: Great Britain

Event: Skateboarding

About: Sky Brown is arguably one of the biggest and brightest stars of any age at this year’s Olympics. At just 13 years and 11 days, she’ll be the youngest Summer Olympian for Great Britain. A fearless and promising athlete, Brown is currently ranked fourth in the world and is highly respected in the skateboarding community. “She could definitely be one of the best female skaters ever… she has such confidence, such force, even at such a young age. The way she’s able to learn new tricks and the way she absorbs direction, it’s so rare,” said skateboarding legend Tony Hawk.

Sky Brown 🇬🇧 wins gold in Women’s Skateboard Park at #XGames 2021! pic.twitter.com/LcGC5OqENB

— X Games (@XGames) July 16, 2021

12. Jessica and Jennifer Gadirova, 16

Country: Great Britain

Event: Gymnastics

About: 16-year-old twin sisters Jessica and Jennifer Gadirova will be each other’s support systems in Tokyo, as they will represent half of Great Britain’s four-person gymnastics team. Jessica flourished at the 2021 European Championships, where she won the bronze in the all-around and silver in vault, and she became the European champion in the floor exercise. Jennifer, a strong vaulter and floor gymnast, is known for her difficult tumbles and eye-catching choreography.

13. Viktoria Listunova, 16

Country: Russia

Event: Gymnastics

About: The postponement of the 2020 Olympics allowed 16-year-old Russian gymnast Viktoria Listunova to be eligible for the 2021 Olympics. “It’s such an opportunity, it is such a big chance,” Listunova says. She is determined to make the most of this opportunity and is considered a possible contender to upset world champion Simone Biles.

14. Rosalie Boissoneault, 18

Country: Canada

Event: Synchronized Swimming

About: A native of Québec, Canada, Rosalie Boissoneault joins the Canadian synchronized swimming team as one of its newest members. She is making her Olympic debut at just 18 years old after joining the senior national team in 2020. Starting in her sport at the age of 3, Boissoneault is a young star looking to make a splash in Tokyo.

15. Rayssa Leal, 12

Country: Brazil

Event: Skateboarding

About: Another young Olympic phenom and friend of Sky Brown is Brazilian skateboarder Rayssa Leal (pronounced “Hi-ee-sa”), known for her many viral trick videos. She is currently second in the World Street Skateboarding rankings. Giving props to her supportive family, Rayssa says, “they don’t pressure me to always win and be first, they encourage me to do what I like, which is skateboarding.”

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16. Regan Smith, 19

Country: USA

Event: Swimming

About:  Regan Smith, the current world-record holder in the women’s 200-meter backstroke, is heading to her first Olympics to represent Team USA. This young star showed off her talent during the World Championships in 2019, where she broke two world records: the 100- and the 200-meter backstroke. Smith will be taking a gap year and plans to attend Stanford in 2022.

17. Brighton Zeuner, 17

Country: USA

Event: Skateboarder

About: Zeuner is coming to the Olympics as a decorated skater with serious competitive chops. She’s the youngest recipient in history to have won two X Games gold medals, and she also holds a Vans Park Series World Championship title. Her great passion and love for skateboarding pushed her to keep going and get her to where she is now. ‘”I love it. Because of skateboarding, I’m kind of who I am. I get validation out of it. It makes me feel human. It’s just a part of me,”’ Zeuner said.

18. Hailey Hernandez, 18

Country: USA

Event: Diving

About: Hailey Hernandez started competing right out of high school and surprised the diving world by placing second in the women’s three-meter springboard at the Olympic trials. “When I hit that water, I knew that I had done it and so I just had the biggest smile on my face,” Hernandez says. Her hometown in Southlake, Texas, threw the two-time World Junior Championship silver medalist an epic Olympic send-off event and will be rooting hard for her this summer.

19. Gaurika Singh, 19

Country: Nepal

Event: Swimming

About: Nepali swimmer Gaurika Singh will represent her country both in the pool and as the flag bearer. The 19-year-old was the youngest athlete at the 2016 Rio Olympics at 13 years and 255 days, and she was chosen to lead the five-member Nepali team in the opening ceremony this year. Singh has collected over nine medals during the South Asian Games and set a record for the most gold medals in 2019.

20. Oceana Mackenzie, 19

Country: Australia

Event: Sport Climbing

About: Australian sport climbing star Oceana Mackenzie will help introduce this new Olympic sport to the world. She started climbing at age of 8 and has been passionate about it ever since. “I love how it’s mentally and physically challenging,” she says. “I have to see the climbs and figure out how to get up them — it’s almost like working out a puzzle.”

Top-seeded Montréal suffered a surprising loss in their first 2025 PWHL Playoffs game on Thursday, falling 3-2 to postseason debutant No. 3-seed Ottawa.

Despite a tense back-and-forth battle, Ottawa forward Shiann Darkangelo broke through with a third-period game-winning goal, pushing the Charge to an early lead in the best-of-five semifinal series.

The Victoire, who notably used their No. 1-seed advantage to handpick the Charge as their semis opponent, have yet to log a playoff win, adding Thursday's defeat to last season's first-round sweep by Boston.

Even so, Montréal is already viewing the loss as fuel to even the score this weekend.

"We outshot them, we had a lot of great opportunities. We were right there," said Victoire forward Laura Stacey. "If we can put that game together for a whole 60 minutes, it'll look scary I think."

Toronto takes Game 1 from defending champs Minnesota

In the PWHL's other semifinal matchup, No. 2-seed Toronto claimed a one-win advantage over No. 4-seed Minnesota on Wednesday, halting the defending champion Frost's late-season surge with a 3-2 Sceptres victory.

Captain Blayre Turnbull opened scoring in the first period, giving Toronto a lead that they never relinquished, while rookie Julia Gosling netted a second-period brace to secure the Sceptres' win.

Minnesota, acknowledging the tough road they face to return to the championship ice, has already set their eyes on Game 2.

"It's going to be a hard-fought series," said Frost head coach Ken Klee after the Frost's Game 1 loss. "We didn't get one tonight…[so now] we're looking forward to Friday."

How to watch the 2025 PWHL Playoffs this weekend

Toronto and Minnesota are back in action for Game 2 of their series at 7 PM ET on Friday, before traveling to St. Paul for Game 3 at 6 PM ET on Sunday.

Sunday will also see Montréal’s attempt to even their series with Ottawa, with the puck dropping on their Game 2 matchup at 2 PM ET.

All games will stream live on the PWHL YouTube channel.

The 2024/25 Women's Super League (WSL) season officially wraps on Saturday, with Chelsea preparing to claim even more history on the heels of their sixth-straight league title.

The still-undefeated Blues will face sixth-place Liverpool in their final outing, with Chelsea on the cusp of becoming the fourth-ever team to finish a WSL season unbeaten.

Should they do so, Chelsea will join 2012's Arsenal, 2016's Manchester City, and their own 2018 squad in achieving perfection — those this year's Blues would be the first to accomplish the feat in the expanded 22-match campaign.

While the team only needs a draw to remain undefeated, a win would secure Chelsea another record, becoming the first club to tally 60 points in a single campaign — two more than the current mark the Blues claimed in 2022/23.

Despite their astounding WSL record, the Blues have fought hard for their dominance this season, with first-year head coach Sonia Bompastor strategically using her entire roster to maintain the winning legacy left by now-USWNT boss Emma Hayes.

"Don't think it's easy. It's never easy," said Bompastor after Chelsea's 2024/25 title win. "It's a great achievement and a lot of work every day — I don't let my players breathe."

Battle for second-place continues on final WSL matchday

While Chelsea chases records, other top WSL clubs are still jockeying for positions on the league's final 2024/25 table.

Along with the Blues, Arsenal and Manchester United are locked into Champions League qualifying positions for next season — but United could leapfrog Arsenal for a second-place WSL finish on Saturday.

Separated by just one point, the Red Devils and the Gunners will face off against each other in the season's final blockbuster matchup.

Arsenal has extra incentive for a good showing, as the Gunners try to snap their two-game WSL losing streak and gain momentum before battling Barcelona in the May 24th Champions League final.

Chelsea also has a shot at another trophy looming, with the Blues chasing a second domestic treble — winning the league, FA Cup, and League Cup.

However, a tough Manchester United stands in the way of Chelsea's third and final treble title, with the pair facing off in the FA Cup's May 18th championship match.

How to watch WSL matches this weekend

All 12 WSL teams will kick off their season's last matches at 7:30 AM ET on Saturday.

Both Chelsea's game against Liverpool and Manchester United's visit to Arsenal will stream live on ESPN+.

As tune-up tournaments like this week's 2025 Italian Open dominate tennis ahead of the 2025 French Open, one familiar name is back in the headlines, with world No. 48 Naomi Osaka making significant strides on the clay court.

Coming off her first tournament win since 2021 at L'Open 35 de Saint-Malo — a WTA 125 event — last weekend, Osaka immediately advanced to the Italian Open's third round this week.

The four-time Grand Slam winner has shown glimpses of brilliance after returning from her 2023 pregnancy, with Osaka now aiming to keep up momentum on her historically weakest surface.

"Kinda ironic to win my first trophy back on the surface that I thought was my worst," Osaka posted after her May 4th victory. "That's one of my favorite things about life though, there's always room to grow and evolve."

Osaka isn't the only tennis star cooking in Europe, as heavy-hitters like world No. 1 Aryna Sabalenka, No. 2 Iga Świątek, and No. 3 Coco Gauff also moved ahead in Rome as they look to hone their Roland-Garros form.

Not usually a clay court specialist, Sabalenka has looked particularly formidable, defeating Gauff to take the 2025 Madrid Open title just last week.

How to watch the 2025 Italian Open

The 2025 Italian Open's Round of 32 kicks off early Saturday morning, with continuing coverage on The Tennis Channel.

Fresh off winning their first-ever WNBA title, the New York Liberty will kick off their 2025 preseason slate with in a Friday night clash against the Connecticut Sun — despite the reigning champs looking a little worse for wear.

Two-time WNBA MVP Breanna Stewart has been slowly recovering from offseason knee surgery, with the 30-year-old watching from the bench on Friday in an effort to return to full fitness for next week's season opener.

Similarly, star guard Betnijah Laney-Hamilton is likely out for the entirety of the 2025 WNBA season with a knee injury of her own, exiting the offseason 3×3 league Unrivaled with a meniscus injury in early March.

Meanwhile, starting sharpshooter Leonie Fiebich has yet to join the Liberty in training camp as the European standout finishes her overseas season with Spain's Valencia Basket.

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Liberty additions to make New York debut on Friday

That said, New York did manage to make a few savvy pick-ups ahead of the 2025 campaign, with the newly configured team eyeing a strong Friday showing to avoid rumors of a slow season start.

The Liberty traded for point guard Natasha Cloud and signed forward Izzy Harrison over the offseason, while also welcoming back guards Marine Johannes and Rebekah Gardner.

Given New York's lengthy availability report, Liberty head coach Sandy Brondello noted that the team's markedly late preseason start was not strategic, but merely a scheduling solution.

"Sometimes it's just out of our hands," Brondello told reporters. "This is the first home game that we've had because we've never been able to get the arena availability, so that's it. Ideally, we would have liked to play the game by now, but it is what it is."

How to watch the New York Liberty in the 2025 WNBA preseason

New York will tip off against Connecticut at 7 PM ET on Friday, with live coverage on WNBA League Pass.