Greatest #USOpen Upsets: @delpotrojuan stunned 5-time defending champion Federer for his first Slam title in 2009. https://t.co/hrZtSa8ftm pic.twitter.com/lNoN3YpqAp — US Open Tennis (@usopen) August 18, 2017It was only the third time Federer had lost a match this year and as a result the 19-times grand slam champion opted to skip the Cincinnati Masters to tend to the injury. "I was sitting on the court in Montreal when he tweaked his lower back and it was really evident that something was wrong with him," Evert said. "You never know, he doesn't say much about his injuries and he made no excuses after the match, but hopefully he's healthy."
Federer will need to be at 100 percent to compete at Flushing Meadows in the gruelling best-of-five-set tournament, where scorching heat and suffocating humidity are the norm. Apart from Federer, world number one Rafael Nadal and Briton Andy Murray, who is coming back from a hip injury that forced him to skip all the hardcourt tournaments in the run up to the Open, are the names in the mix as potential winners of the final major of the season. If those favorites falter, the tournament is up for grabs, McEnroe said. "It wouldn't be shocking considering that Roger is 36 and he's had two majors already so perhaps things don't go as smoothly as they did the other times. And let's say Nadal wasn't around and Murray wasn't healthy, then it's like, who is going to do it?" "That's where it really gets open," he said.
THIS WEEK'S COVER: The world can learn a lot from Roger Federer, as he chases his third major of the year pic.twitter.com/Hz7oCHRszJ— Sports Illustrated (@SInow) August 22, 2017