The Frenchman's exposure to Benoit Paire, who tested positive for COVID-19, was discussed for hours before the match was eventually allowed to go on. "I was told that there was very little chance we were going to play," said Zverev, who won in four sets.

David Chen has traveled the world to play tennis tournaments for over 20 years, but he's never been on a journey like this.

The 25-year-old has been outspoken on a number of recent issues.

The 25-year-old has been outspoken on a number of recent issues, including the US Open's decision on qualifying and the Black Lives Matter movement.

Americans Danielle Collins, Sloane Stephens advanced in Charleston, along with Victoria Azarenka and Sachia Vickery in Monterrey.