A thrilling seventh game had both players scrambling in long rallies as the momentum shifted back and forth until Gauff fired a backhand winner and screamed in triumph.
Australian Open defending champion Madison Keys raised her game in the Melbourne Park heat to beat Karolina Pliskova 6-3, 6-3 and reach the fourth round.
The four-times Grand Slam champion, who is eyeing her third Australian Open trophy when the tournament begins on January 18 at Melbourne Park, was pushed harder in the next set but edged ahead again at 5-4 to wrap up the win on serve.
Victoria Mboko, a 19-year-old Canadian tennis player, defeated Australian Open champion Elena Rybakina in the Qatar Open quarter-finals, marking a significant step towards entering the WTA top 10 rankings.
Novak Djokovic fights past Aleksandar Kovacevic to reach the last 16 at Indian Wells Open, setting up a clash with defending champion Jack Draper.
The day session attendance of 51,048 was some 10,000 short of day six on Friday and even less than last year's corresponding session.
IMAGES from all the action on Day 8 of the Australian Open in Melbourne on Sunday.
At this year's US Open second-round match against Sorana Cirstea, Muchova broke down mid-match in a scene that was as human as it was unexpected.
Venus Williams showed flashes of vintage form under the lights at Arthur Ashe Stadium on Monday but despite pushing Karolina Muchova to a deciding set.
Six weeks ago Amanda Anisimova couldn't win a single game against Iga Swiatek in the Wimbledon final. On Wednesday the American beat the Polish second seed in straight sets.
'We heard it was like the Hollywood of mixed doubles.'
Venus Williams, 45, made an age-defying return to tennis this year, becoming the oldest WTA singles match winner since 2004 in July.
Renata Zarazua, the only Mexican player in the US Open main draw, pulled off a stunning upset by beating sixth seed Madison Keys in the first round.
It was Kristyna's first win over a top-five ranked player and she will go on to play fellow Czech Barbora Strycova in the quarter-finals.
'The kids are already used to this place. We go back and that's a different environment.' 'So, mentally, emotionally we are stressed.'
Iga Swiatek was the latest top player to suffer an upset loss in Montreal as the Wimbledon champion
Naomi Osaka produced a commanding performance to knock out third seed Coco Gauff.
The 2025 US Open is more than just a tennis tournament; it's a bold display of personal expression and a vibrant celebration of style.
Tenth seed Lorenzo Musetti rallied from a set down to beat Frenchman Giovanni Mpetshi Perricard in the first round of the US Open on Tuesday even as Carlos Alcaraz mauled big-serving American Reilly Opelka and veteran Venus Williams made an emotional exit.
The Women's Tennis Association (WTA) said it has banned a man who exhibited "fixated behaviour" towards Emma Raducanu after he was taken away by security personnel during the Briton's match at the Dubai Championship late on Tuesday.
Maria crowned first Queen's Club women's champion in 52 years
Czech Karolina Pliskova stopped upset-maker Varvara Lepchenko in the semi-finals at the Bank of The West Classic in Stanford, California, on Saturday.
Russian teenage sensation Mirra Andreeva continued her giant-slaying exploits at the Dubai Tennis Championships by upsetting Kazakhstani sixth seed Elena Rybakina 6-4, 4-6, 6-3 in the semi-finals on Friday.
American lucky loser Reilly Opelka put up an intense battle to stun top seed Daniil Medvedev 7-6(5), 7-6(5) and reach the Libema Open semi-finals in Den Bosch on Friday.
Muchova, who came into the match against the 12th seed with a world ranking of 202, was understandably nervous from the outset but grew into the contest and eventually prevailed 3-6, 6-4, 6-4 in two hours and 27 minutes.
Karolina Pliskova reached the Australian Open quarter-finals for the first time on Monday and is keen to prove right those tipping her for Grand Slam success.
Twice champion Iga Swiatek walloped Czech Karolina Muchova in straight sets to reach the Indian Wells quarter-finals on Tuesday.
List of Wimbledon women's singles champions after Iga Swiatek beat Amanda Anisimova in the final on Saturday:
The Dutchman collapsed on the court after converting his sixth match-point to end an absorbing three hour, seven minute affair under sunny skies on Stadium One court.
Russian teenage sensation Mirra Andreeva continued her giant-slaying exploits at the Dubai Tennis Championships by upsetting Kazakhstani sixth seed Elena Rybakina in the semi-finals.
Heading into the final, Gauff had lost the first set in three straight matches and the former U.S. Open champion seemed determined to buck that trend, serving to love in the opening game and breaking early for a 2-0 lead.
Images from the US Open women's singles semi-finals at Flushing Meadows on Thursday.
Russian seventh seed Daniil Medvedev, the 2023 Miami champion who arrived this year fresh off a run to the Indian Wells semi-finals, crashed out at the first hurdle as he fell 6-2, 6-3 to Spaniard Jaume Munar.
Karolina Muchova snapped U.S. Open champion Aryna Sabalenka's 15-match win streak to shock her 7-6(5) 2-6 6-4 in the China Open quarter-finals on Friday, while Olympic champion Zheng Qinwen beat Mirra Andreeva 5-7 6-0 6-4 to reach the semi-finals.
Madison Keys was dumped out of the Miami Open third round on Sunday, falling 6-4, 6-2 to Philippine wild card Alexandra Eala
Fonseca cruised through the first set before Fearnley found his groove in the second to level the match on a windy day in the California desert.
Defending champion Iga Swiatek crushed Dayana Yastremska 6-0, 6-2 and 2023 champion Elena Rybakina powered past Britain's Katie Boulter 6-0, 7-5 to reach the fourth round of Indian Wells on Sunday in displays of dominance.
Images from the US Open women's singles second round matches, at Flushing Meadows, New York, on Thursday.
All the action from Day 4 at the Australian Open on Wednesday
Carlos Alcaraz will be backed to extend his winning run at the Grand Slams to 16 matches following triumphant French Open and Wimbledon campaigns.
