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.
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.
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.
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.
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.
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.
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.
Maria crowned first Queen's Club women's champion in 52 years
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.
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.
Twice champion Iga Swiatek walloped Czech Karolina Muchova in straight sets to reach the Indian Wells quarter-finals on Tuesday.
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.
Images from the US Open women's singles semi-finals at Flushing Meadows on Thursday.
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.
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.
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.
Images from the US Open women's singles second round matches, at Flushing Meadows, New York, on Thursday.
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.
Naomi Osaka has four major titles under her belt but the second round at Flushing Meadows, Wimbledon and Roland Garros was as good as it got this year for the Japanese 26-year-old, who exited the Australian Open in the first round.
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.
Romania's Ana Bogdan advanced the quarterfinals of the Japan Open with a 6-0, 7-6 (5) victory over No. 4 seed Marie Bouzkova of the Czech Republic on Thursday in Osaka.
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.
Images from the US Open women's singles quarter-finals at Flushing Meadows on Wednesday.
All the action from Day 4 at the Australian Open on Wednesday
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 Monday's Round of 16 women's singles matches at the US Open.
Coco Gauff fought back from a set down to beat Spain's Paula Badosa 4-6, 6-4, 6-2 in the semi-finals of the China Open in Beijing on Saturday.
Climate protesters halted the US Open women's semi-final between American Coco Gauff and Czech Karolina Muchova for nearly an hour on Thursday.
Muchova says Grand Slam hunger behind another Sakkari upset in Paris
Italy's Sara Errani and Jasmine Paolini beat Mirra Andreeva and Diana Shnaider 2-6, 6-1, (10-7) to win Olympic gold in the women's doubles tennis on Sunday.
The 30-year-old said she was more nervous before facing world number one Iga Swiatek in the quarter-finals, a match she won in straight sets.
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