Just days ahead of taking the 2025 US Open court, US tennis star Coco Gauff has reportedly parted ways with coach Matthew Daly, after he helped guide the world No. 3 to her first French Open title earlier this year.

Gauff originally hired Daly, a grip specialist, following a disappointing 2024 US Open run, ultimately finishing out the season by adding 2024 China Open and 2024 WTA Finals hardware to her trophy case.

However, despite her breakthrough performance at this year's Roland Garros, the 21-year-old has struggled with her serve this season, most recently registering 42 double faults across her three matches at the 2025 Canadian Open and 16 in her 2025 Cincinnati Open quarterfinal clash.

In Daly's absence, Gauff will still be working with longtime coach JC Faurel while also adding Gavin MacMillan to her 2025 US Open team — a biomechanics specialist who No. 1 Aryna Sabalenka has credited for helping her find consistency with her serve.

"I'm very much a perfectionist type of person," Gauff recently told reporters. "So it's really nothing satisfying until you're holding the big trophy, to be honest."

Gauff's next shot at a big trophy begins on Sunday, when the main draw of the 2025 US Open — the last Grand Slam of the year — hits courts in Queens, NY.

The 2023 US Open champion will face Australia's No. 84 Ajla Tomljanović in her first-round match.

Tennis star Iga Świątek can cross another item off her bucket list, with the world No. 3 downing No. 10 Elena Rybakina 7-5, 6-3 on Sunday to clinch a spot in the 2025 Cincinnati Open final — Świątek's first-ever championship appearance at the US Open tune-up tournament.

"At the beginning, the level was pretty crazy," the six-time Grand Slam winner told reporters after Sunday's match, commending Rybakina. "But I was there to play with intensity, good quality, and I'm happy with the performance."

One of only two WTA 1000 events without a Świątek finals appearance, the annual Cincinnati Open has seen the Polish tennis star advance to the semifinals in both 2023 and 2024 — falling both times to the eventual tournament champion.

With No. 1 Aryna Sabalenka and No. 2 Coco Gauff both making quarterfinal exits, Świątek will next face No. 9 Jasmine Paolini in Monday's final, after the Italian contender fought past No. 36 Veronika Kudermetova 6-3, 6-7(2), 6-3 in their Sunday afternoon semifinal.

Świątek last shared a finals court with Paolini at the 2024 French Open, with Świątek going on to lift her fourth Roland Garros trophy following a straight-set victory in the clash.

How to watch the 2025 Cincinnati Open final

The 2025 Cincinnati Open final between Świątek and Paolini kicks off at 6 PM ET on Monday, with live coverage airing on the Tennis Channel.

Tennis fans saw an epic battle on Monday, as world No. 39 Emma Raducanu forced No. 1 Aryna Sabalenka into a third-set tiebreak in the third round of the 2025 Cincinnati Open.

The British 22-year-old, who burst into the sport's upper echelons by winning the 2021 US Open as an unseeded teenage qualifier, came achingly close to ousting the top-ranked three-time Grand Slam winner in a match that required more than three hours and two tie-breaks to resolve.

"She's world No. 1 for a reason, and I pushed her more than I did at Wimbledon so that's an improvement," said Raducanu, ultimately falling to the 2024 Cincinnati Open winner in Monday's narrow 7-6 (3), 4-6, 7-6 (5) loss.

Clearly affected by the oppressive humidity of the southern Ohio summer, Sabalenka took risks in the match's late stages to offset her 72 unforced errors and her diminishing energy.

"At the end, I went for crazy shots," Sabalenka told the crowd following the 2025 US Open tune-up match. "I think that it was a little bit risky from me and it really helped to put a lot of pressure on her."

Along with Sabalenka, this week's Round of 16 will feature at least four other Top-10 contenders, as 2025 Australian Open victor No. 6 Madison Keys and Kazakhstan's No. 10 Elena Rybakina booked their own Round of 32 wins on Monday, while 2025 French Open champion No. 2 Coco Gauff and 2025 Wimbledon winner No. 3 Iga Świątek enjoyed extra rest as their third-round opponents withdrew due to illness and injury on Tuesday.

Hoping to join the Gauff and Keys's advancing US contingent are No. 4 Jessica Pegula and No. 35 Ashlyn Krueger, who will face Poland's No. 40 Magda Linette and Italy's No. 9 Jasmine Paolini, respectively, on Tuesday.

How to watch the Cincinnati Open

Tennis's best will keep battling for Cincy's trophy — and an edge going into the season's final Grand Slam — this week: The third round will wrap on Tuesday before the Round of 16 kicks off on Wednesday.

Live coverage of the 2025 Cincinnati Open will continue airing on the Tennis Channel.

The 2025 Canadian Open wrapped up with a storybook ending in Montréal, as 18-year-old Canadian Victoria Mboko earned her first-ever WTA Tour title by defeating four-time Grand Slam winner Naomi Osaka in Thursday's final.

"I would have never thought that I would have made it to the final, let alone win the tournament," Mboko said after battling back to take down Osaka 2-6, 6-4, 6-1. "It just proves that your dreams are closer than they [seem]."

The largely unexpected final matchup capped a 2025 Canadian Open that saw every seeded player fall, with Mboko putting together a dream run that included ousting four Grand Slam champions — Osaka, Sofia Kenin, Elena Rybakina, and Coco Gauff.

Thursday saw Mboko become just the third-ever Canadian to win the event, plus the teen phenom made tennis history as only the third wild-card entrant to ever claim victory in a WTA 1000 tournament.

As for Osaka, despite falling just short of the finish line, the 2025 Canadian Open was a distinct return to form for the fan favorite, who put together her most successful tournament run in three years in Montréal this week.

Both finalists earned a significant rankings bump with their performances this week, with Osaka rising to world No. 25 while Mboko, who started the 2025 season outside the WTA's Top 350, skyrocketed to No. 24.

Having withdrawn from the 2025 Cincinnati Open due to the near-impossible turnaround between Thursday's final in Montréal and their Saturday matches in Ohio, both Mboko and Osaka will enjoy some much-deserved rest before gearing up for the season's final Grand Slam — the 2025 US Open.