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Venus Williams shocked defending champion Kiki Bertens at the Western and Southern Open in Cincinnati.
The seven-time grand slam champion prevailed over the No 5 seed 6-3 3-6 7-6 (4) in a gruelling second-round match that lasted two hours and 17 minutes.
Williams gained revenge over Bertens after her victory in three sets at Wimbledon last month.
The 39-year-old American remained composed this time for her second top-five victory of the season to go alongside her win over then-number three Petra Kvitova at Indian Wells.
Meanwhile, Serena Williams withdrew from the tournament citing a back problem which forced her to pull out of the Rogers Cup final at the weekend.
Wimbledon 2019 best picturesShow all 45 1 /45Wimbledon 2019 best pictures Wimbledon 2019 best pictures Wimbledon 2019 best pictures General view of the Wimbledon logo on the base of a tennis racquet
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Andy Murray and Serena Williams during their mixed doubles match on day eight
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Simona Halep of Romania shakes hands with Shuai Zhang of China
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Serena Williams celebrates her win over Alison Riske in the quarter-finals
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Barbora Strycova celebrates winning her quarter final match against Britain's Johanna Konta
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Wimbledon 2019 best pictures
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Cori Gauff celebrates beating Polona Hercog.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Spectators make their way into the grounds.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Eugenie Bouchard wipes her face between games against Slovakia's Tamara Zidansek.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Roger Federer in action
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures John Bercow, Speaker of the House of Commons, gets stuck in.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Cori Gauff celebrates beating Venus Williams
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Cori Gauff celebrates beating Venus Williams
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Naomi Osaka reacts as she plays Kazakstan's Yulia Putintseva
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Fans watch Roger Federer
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Meghan Markle, the Duchess of Sussex (C) and two friends watch Serena Williams.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Nick Kyrgios bends over the net
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A general (and very lovely) view of the grounds.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures The Duchess of Cambridge watches on
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Spectators watch a match on court 18
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A ball boy holds up a ball.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Simona Halep eyes the ball
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Matteo Berrettini celebrates after beating Diego Schwartzman.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Harriet Dart serves against World No 1 Ashleigh Barty.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A branded badge on a Ralph Lauren jacket
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Mollie King and Stuart Broad attend day six of The Championships.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Supporters watch on
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Roger Federer runs to return the ball
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Heather Watson celebrates match point
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A woman eats a bowl of strawberries and cream
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Roger Federer in action
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Eugenie Bouchard in action
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Novak Djokovic returns the ball
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A spectator takes a photograph
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Oi oi! Roger Federer changes his shirt in the break between games against Lucas Pouille.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Gael Monfils returns the ball
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures A line judge reacts after being hit by a ball
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures General view of Centre Court
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Alexander Zverev celebrates before eventually going out in the first round
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Rafael Nadal changes his head band.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Anett Kontaveit serves
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Play goes on on the outer courts
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Netherlands's Jean-Julien Rojer and Romania's Horia Tecau play against France's Fabrice Martin and Monaco's Hugo Nys.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Andy Murray and Serena Williams celebrate their mixed doubles victory.
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Wimbledon 2019 best pictures Wimbledon 2019 best pictures Cori Gauff leaves court after beating Magdalena Rybarikova.
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The American was due to face Zarina Diyas in the first round in Ohio on Tuesday evening.
Quoted on the WTA site, she said: "I am so sad to withdraw from the Western & Southern Open as it is truly one of the tournaments I most love to play."
Williams serves in Cincinnati (Getty) Elsewhere, unseeded Anett Kontaveit upset former world number one Angelique Kerber 7-6 (7) 6-2 in their first-round match, while Madison Keys squeaked past 2017 champion Garbine Muguruza 6-7 (4) 7-6 (5) 6-4.
There were also wins for Victoria Azarenka, Donna Vekic, Jennifer Brady, Ekaterina Alexandrova and Yafan Wang.
PA contributed to this report
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