From a pair of Grand Slam champions reuniting, to a valiant return to the courts, here are Monday's Top 5 photos from the Wuhan Open.

Former Wuhan winner Venus Williams and 2019 International Tennis Hall of Fame inductee Li Na caught up during a boat ride on the Yangtze River. Li went 3-0 against Williams in her career before retiring in 2014.

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Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

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Fifth seed Petra Kvitova opened her quest for a third event title with a 7-6 (6), 6-3 victory over Polona Hercog. Kvitova triumphed in 2014 and 2016, and has won 14 of her 17 matches at the WTA Premier 5 tournament.

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

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American Amanda Anisimova made an inspiring return to the courts by defeating last week's Guangzhou finalist Samantha Stosur, 6-3, 3-6, 6-3. Anisimova was playing her first match since her father and coach, Konstantin, passed away the week prior to the US Open.

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

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Defending champion Aryna Sabalenka was ruthless in her second-round match, dispatching Danielle Collins, 6-1, 6-0, in just 52 minutes. Sabalenka broke the American six times from 10 break point chances.

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Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

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Garbine Muguruza picked up her first match win since the French Open after advancing past wild card Peng Shuai, 6-3, 6-2. With the victory, Muguruza snapped a five-match losing streak and will next meet world No. 3 Elina Svitolina.

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

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Getty Images

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River

Top 5 Photos, September 23: Li Na & Venus ride down Yangtze River