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.”

Led by undefeated overall No. 1-seed Nebraska, the college volleyball elite will begin their quest for the 2025 national championship on Thursday, when the first round of the 64-team NCAA Division I tournament hits courts nationwide.

The Huskers are still chasing a perfect season, entering the 2025 title hunt on a 30-0 run having dropped just six sets all season — including losing just one set since September 16th.

"I was expecting us to be great, but certainly not undefeated," said Nebraska alumna and first-year Cornhusker head coach Dani Busboom Kelly on a recent episode of the Welcome to the Party podcast. "They continue to exceed our expectations."

Busboom Kelly's roster is loaded with the kind of experienced connection that only comes when the core of players have competed together for three straight seasons — an increasing rarity in the transfer portal and NIL era.

That said, this core has unfinished business on the national stage, with the superstar junior trio of middle blocker Andi Jackson, outside hitter Harper Murray, and setter Bergen Reilly — all AVCA Player of the Year semifinalists — looking to bring the first NCAA trophy in eight years back to Lincoln.

"It's such a special row, because we just know that all of us have been through thick and thin together and our bond is so strong," Jackson told USA Today Sports earlier this week. "[And Busboom Kelly] gives us so much confidence and we know that with her as our coach, we just can play fearless."

Stacked tournament field looks to spoil Nebraska's season

Even with their "fearless" play, a host of stellar opponents await Nebraska in the NCAA tournament gauntlet, hoping to play spoiler — including Busboom Kelly's previous program, the Louisville Cardinals, who await the Cornhuskers as the No. 2-seed in their own regional quadrant.

Fellow No. 1 seeds Texas, Kentucky, and Pitt will also chase their eventual chance at the Huskers via their own regionals, where the Longhorns could see arguably the stiffest competition from both No. 2-seed Stanford — the winningest program in NCAA volleyball history — and defending champion and No. 8-seed Penn State.

With tickets to the 2025 Final Four in Kansas City on the line, the NCAA volleyball bracket's 64 squads will start serving at 16 campus sites on Thursday.

How to watch the first round of the 2025 NCAA volleyball tournament

This year's NCAA volleyball finale begins when No. 5-seed Colorado takes on unseeded American University at 3 PM ET on Thursday, kicking off a two-day first round of 32 matches — with No. 1 Nebraska looking to handle Long Island University in their initial tournament tilt at 8 PM ET on Friday.

All games in the early rounds of the 2025 Division I tournament will air live on ESPN+.

US tennis star Coco Gauff continues to win off the court, with the 2025 French Open champion topping Sportico's list of the 15 Highest-Paid Female Athletes for the third consecutive year.

Fueled by $23 million in off-court endorsements, the $31 million earned by the 21-year-old world No. 3 WTA player edged out the $30 million total income that fellow tennis star and world No. 1 Aryna Sabalenka garnered in 2025.

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Unsurprisingly, a full 10 athletes on the Sportico Top 15 list are tennis stars, a direct result of the fact that all four Grand Slams and the Masters 1000 tournaments boast equal prize money between the men's and women's competitions — a shift that began with the 1973 US Open.

That established expectation of gender equity in prize money has tennis far outpacing salaries in most other women's sports.

Also making the Top 15 are two LPGA golfers — world No. 1 Jeeno Thitikul (No. 15 on the Highest-Paid Female Athletes list) and US star No. 2 Nelly Korda (No. 7) — as well as popular Olympic skiier Eileen Gu (No. 4), WNBA superstar Caitlin Clark (No. 6), and USA gymnastics legend Simone Biles (No. 11).

Notably, Gu, Clark, and Biles as well as Venus Williams (No. 14) all proved the power of endorsements on this year's list, with nearly all of the quartet's earnings coming from sponsorship deals.

As WNBA CBA negotiations rage on, revenue sharing continues to be a wedge issue for both sides of the table, with the league office and the WNBPA eyeing the terms of the most recent proposal from differing viewpoints.

The Athletic reported on Wednesday that the WNBA believes it has offered the revenue-sharing salary model that the players have pushed for throughout the CBA talks, leaving athletes to claim 50% of the "sharable" portion of league revenue.

How the WNBA will determine the "sharable" cut is uncertain, though sources claim the compensation structure on offer will result in players taking home less than 15% of the league's total earnings.

That percentage is likely to take a further hit over the lifetime of a new CBA, according to the league's multi-year earning projections.

"I don't feel like there's any cultivation of a culture of trust [in the CBA talks]," WNBPA president and Seattle Storm star Nneka Ogwumike told The Athletic. "I feel like we've been heard, but not listened to, and I'm hoping that that changes in this 40-day extension, because what we want to do is get a good deal done."

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Parental leave, draft combine, and more enters the WNBA CBA talks

Along with the issue of revenue sharing, the latest WNBA offer also reportedly outlined other proposals, such as the institution of a required offseason draft combine, the elimination of team housing, and the possible extension of the competition calendar by starting earlier and/or finishing the season later.

As for the WNBPA's Tuesday counteroffer, the players union is seeking to eliminate the core designation and shorten the current four-year rookie contract to three years.

The WNBPA is also asking to add non-birthing parental leave, retirement benefits, and reimbursements for mental healthcare.

The WNBA and WNBPA will meet again to negotiate sometime this week, with talks racing toward the second-extension deadline of January 9th, 2026.

After setting a new NCAA basketball record by scoring 100+ points in eight consecutive games, the No. 5 LSU Tigers will face their season's first true test when they visit the preseason-No. 7 Duke Blue Devils as part of the 2025 ACC/SEC Challenge on Thursday night.

"We don't play nobody in our nonconference schedule," senior guard Flau'jae Johnson told JWS in November. "From December on out, that's when it gets really [exciting]."

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With their history-making string of lopsided wins under their belt, the Tigers will try to keep the streak alive against a now-unranked Duke side on a three-game losing skid.

The Blue Devils will rely on leading scorer and rebounder Toby Fournier for a spark, with the sophomore forward averaging 15.8 points per game despite Duke's 3-5 start.

As for LSU, the title-hunting Tigers will look to stat undefeated behind Johnson's team-leading 17.0 scoring average, as well as the 16.1 points per game put up by junior star transfer MiLaysia Fulwiley.

"Ballers just want to ball, like hoopers just want to hoop," Johnson said of LSU's quick cohesion this season. "You find different ways to bond and gel with teammates."

How to watch LSU vs. Duke on Thursday

Duke will host No. 5 LSU in the 2025 ACC/SEC Challenge at 9 PM ET, with live coverage airing on ESPN.