(Reuters) - A fearless Andrey Rublev outfoxed Roger Federer 6-3 6-4 in the third round of the Cincinnati Masters on Thursday.
The Russian qualifier broke the third seeded Swiss in his first two service games and won 81% of his first serve points to wrap up the upset in just over an hour.
The 21-year-old shed tears of joy after pulling off the biggest win of his career.
"It is such an amazing feeling when you're playing a legend like Roger and all these people supporting him until the end," he told ESPN in an on-court interview.
"One day I hope I'm going to feel the same.
"Today I was just trying to do my best and was thinking in my head that I need to play every point until the end no matter what."
The win sets up an all Russian quarter-final with ninth seed Daniil Medvedev.
(Reporting by Rory Carroll, editing by Pritha Sarkar)