It was the 19-year-old's second career win over a top-five player, after he defeated Daniil Medvedev in the Australian Open second round in January.

American Learner Tien knocked out No. 1 seed Alexander Zverev, while three players exited citing stomach issues.

Day 3 of the ATP Mexican Open in Acapulco was chaotic, as all five of the top seeds were out. Tommy Paul and Casper Ruud ...

Zverev was upset 6-3, 6-4 by world No 83 Learner Tien in the second round of the ATP 500 tournament in Acapulco. Zverev, who ...

Zverev is one of several top players in Acapulco who was reportedly affected by stomach issues or food poisoning, with the ...

Casper Ruud and Tommy Paul both pulled out of their last 16 matches at the Mexican Open, while Holger Rune managed just three ...

Casper Ruud was one of three top seeds to exit the Mexican Open on Wednesday due to the effects of a stomach bug, while both ...

Find out how to watch, live stream, TV channel, tournament information, & more for Denis Shapovalov vs. Marcos Giron at the ...

Casper Ruud was one of three top seeds to exit the Mexican Open on Wednesday due to the effects of a stomach bug, while both ...

Canada's Denis Shapovalov defeated American Alex Michelsen 6-4, 6-3 on Wednesday to advance to the quarterfinals of the ...