Analytics & Stats US Open WTA
Analysts Praise Coco Gauff’s Mid-Open Serve Overhaul as Risky but Necessary
Coco Gauff adjusted her serve during the 2025 US Open; analysts called the mid-tournament work bold.

On-air analysts praised Coco Gauff’s decision to rework her serve during the 2025 US Open after a narrow first-round win over Ajla Tomljanovic.
“Most people would have waited until after this tournament, maybe sought out some exhibitions to be able to trial it in a low-stakes, low-pressure environment, but that’s not Coco Gauff,” said former world No. 1 Jim Courier. “That’s why she’s going to be one of the game’s greats, because she’s willing to just lay it on the line constantly and fight through it. Frankly, I love and admire it, and I’m just baffled that she has the chutzpah to do it.”
Gauff was seen working with biomechanic expert Gavin MacMillan in the days before the final major of the season, and later confirmed she had parted ways with coach Matt Daly and linked up with MacMillan. MacMillan is credited in this context with reworking the serve of current world No. 1 Aryna Sabalenka.
“It’s really fascinating,” said Courier. “Jannik Sinner made a change with his footwork before Wimbledon a couple of years ago but that was just the footwork. She’s doing a little bit different things with her hip, her shoulders, with her racquet toss. This is highly complicated stuff, and to put it into practice in real time, I cannot stress enough how much that takes guts.”
Gauff served 10 double faults in the match with Tomljanovic, an improvement from the 16 she struck in Cincinnati the previous week against Jasmine Paolini. Under the lights on Arthur Ashe Stadium, and despite a degree of emotional exhaustion, she closed out a 6-4, 6-7 (2), 7-5 victory to reach the second round.
“You can see her make the real-time adjustments in between what she would miss on the first and what she would do on the second,” noted Lindsay Davenport. “If you were really looking at her, you could see her saying, ‘Ok, now I’m going to do this.’ So, she was trying to implement all these changes, between first, between seconds. That takes energy out of you, as well. My heart really broke when she was admitting that this was such a tough week.
“Normally, when you go into a major, you want things to go great, you’re trying to get your player to feel great about themselves and it’s just a little bit of fine-tuning, ‘Oh, maybe just a few more cross-court.’ Not such detailed instruction.”
Chanda Rubin highlighted Gauff’s baseline play and the quality of rallies. “She said after the match that it wasn’t great at times, but she had some incredible rallies with Ajla Tomljanovic,” said Rubin. “There was a high level of tennis at times, and I think a lot of it got overshadowed by the serve, but there was a lot I think she could be proud of how she got through that match.”
Courier warned the changes will likely prevent Gauff from reaching her peak form in Flushing Meadows but could pay dividends later. “When players talk about getting into the zone, that spot where they’re just reacting and flowing and feeling their tennis, they’re not thinking one bit about technique,” said Courier. “Unfortunately for her, she’s going to have to be thinking about this technique. She has to be super mindful. It’s literally the only thing she’s thinking about when she sets up to hit a serve.
“So, there’s no way she’s going to play her best tennis this tournament. No way. But if this works for her and by the end of this year or by the Australian Open, she no longer has to think about it and she can get into that flow state, that’s an investment worth making.”
Analytics & Stats ATP US Open
Djokovic Sets New Major Hard-Court Wins Record in New York
Djokovic broke the major hard-court wins record in New York and extended his Grand Slam tally again.

Novak Djokovic arrived at the 2025 US Open chasing a record-extending 25th Grand Slam title and delivered another landmark performance in the third round.
The 38-year-old secured a 6-4, 6-7(4), 6-2, 6-3 victory over world No 35 Cameron Norrie in Arthur Ashe Stadium on Friday night. He is also vying for a record-equalling fifth US Open men’s singles crown.
With that win Djokovic recorded his 192nd hard-court Grand Slam victory, a mark that moved him past Roger Federer to become the outright record-holder for most hard-court wins at majors. He had first drawn level with Federer with his second-round victory before surpassing him in New York.
The Serb has also extended his all-time Grand Slam match wins to 395, a tally that underlines his sustained success at the sport’s biggest events.
Djokovic remains the longest-serving world number one in history, having spent a record 428 weeks at the top. The article notes a complicating detail from August 2024: 400 ranking points Jannik Sinner earned for reaching the Indian Wells semi-finals were later invalidated following positive doping tests, yet the ATP did not retroactively remove those points from Sinner’s ranking. Had those points been subtracted, Djokovic would have reclaimed the top ranking for one week in August 2024 and the weeks-at-No 1 total would have read 429 instead of 428. A journalist outlined that scenario to Djokovic after his win and asked whether the ATP should award him the additional week. Djokovic replied:
“(Smiles) Yeah, maybe. Maybe we’ll have this discussion another time, but right now, I’m okay with it. I’m okay with it. Right now, it’s fine, but honestly, I forgot about it. I didn’t even think about it,” Djokovic replied.
“But look, it’s been a great career of hunting the No 1 for me and defending the No 1 and I mean, I’ve been there longer than anyone, so one week more or less at this moment in time is not so relevant. But maybe that will change (laughs).”
On the match against Norrie, Djokovic said: “I guess coming into the match, any match, you really want to win in straight sets without any drama and just ease through, but that’s not possible.
“My team wants me to suffer on the court so I can get some more minutes spent in match play. It’s good that I get tested.
“I hadn’t played any matches since Wimbledon and it’s been for us quite a long time, five to six weeks. I’m still trying to find my groove and my rhythm on court.”
Analytics & Stats ATP US Open
McEnroe: Medvedev’s US Open implosion reveals deeper confidence issues
McEnroe says he ‘loved every minute’ of Medvedev’s US Open collapse and questions his future. Today.

John McEnroe delivered a blunt assessment of Daniil Medvedev after the Russian’s dramatic US Open defeat, saying he “loved every minute” of the on-court meltdown while warning that Medvedev “has got to get his act together.”
Medvedev, the 2021 US Open champion, has endured a difficult Grand Slam season with a 1-4 record at the majors this year, exiting in the first round at Wimbledon and the French Open and falling in the second round at the Australian Open.
In the match with Benjamin Bonzi the contest swung on a chaotic sequence at 5-4, AD-40 in the third set when Bonzi held match point on his serve. After Bonzi missed his first serve a photographer entered the court before the Frenchman’s second serve. Chair umpire Greg Allensworth awarded Bonzi another first serve, a decision that provoked a furious reaction from Medvedev. He encouraged the crowd to protest louder and joined in booing directed at Allensworth, producing a six-minute delay before play resumed.
Medvedev broke back, won the set in a tiebreak and then dominated the fourth as Bonzi began to struggle physically. Yet in the deciding set Medvedev twice squandered a break advantage and Bonzi prevailed after Medvedev suffered hand cramps late in the match. A furious Medvedev destroyed his rackets and remained on court until midway through Bonzi’s on-court interview.
The world No 16 was fined $42,500: $30,000 for unsportsmanlike conduct and $12,500 for smashing rackets against his chair.
McEnroe made the comments on the Nothing Major podcast with John Isner, Sam Querrey and Steve Johnson. Asked by Johnson what he thought about Medvedev’s outburst, McEnroe — who is no stranger to on-court controversy — said: “Besides loving every minute of it? Well you know, he already has tapped out, like months ago,” said the former world No 1.
“So I’ve been worried about his level ’cause he doesn’t know what the hell he’s doing at this point, to me, for a guy that good on hard courts.
“So this sort of cemented it, like how little confidence he has in anything. But I was sorta hoping, I gotta admit — not at Bonzi’s expense because he showed a lot of balls at the end, to me, in the fifth set — but I was sort of hoping Medvedev would win that.
“If I was Bonzi, by the way, I would have, about three minutes into this six or seven minute break, I would have put up the ball and said: ‘I don’t even need a first serve. Here’s a ball, second serve. I’m gonna win this anyway.’ Medvedev probably would have missed the return, we wouldn’t be talking about this.
“But he (Medvedev) has got to get his act together. I’m not sure he can. I think he’s so lost right now, I’m not sure what’s gonna happen with him in the future. I always liked Daniil and there’s something about the US Open that brings out the best and worst of him.”
Analytics & Stats ATP US Open
Djokovic breaks Federer’s hard-court Grand Slam wins record, ties another Open Era mark
Djokovic records 192nd hard-court Grand Slam win, surpassing Federer; ties another Open Era mark….

Novak Djokovic added a fresh entry to his record book at the US Open, surpassing Roger Federer for the most career wins at hard-court Grand Slams. In the third round in Flushing Meadows he beat Cam Norrie 6-4, 6-7 (4), 6-2, 6-3 to register his 192nd victory at a hard-court major and move past Federer’s all-time men’s total.
The win carried Djokovic into the tournament’s second week and continued a perfect head-to-head against Norrie, extending the series to 7-0. The result also left Djokovic level with Federer for another milestone: the most fourth-round appearances at Grand Slams for a man in the Open Era.
For context, the US Open has been contested on hard courts since 1978, and the Australian Open adopted hard courts in 1988. Those surfaces are the setting for the record Djokovic now holds, a mark that reflects sustained success across the two hard-court majors.
The match score underlines a contest that was not straightforward: Djokovic prevailed in four sets after dropping the second-set tiebreak. The victory preserves his deeper run in the tournament and cements a statistical milestone against the backdrop of Grand Slam history.
Roger Federer’s standing on hard courts has been a benchmark for decades, and Djokovic’s new total alters that measure. Djokovic’s tie with Federer for most fourth-round appearances further emphasizes consistency at majors across years.
More to come…
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