Roger Federer will not be competing at the Olympic Games in Tokyo this month after all.

The world-renowned tennis champ announced the news Tuesday on Twitter, writing that a previous knee injury has left him with no other choice but to withdraw.

Federer, who is ranked No. 8 in the world, has competed in the Olympics four times and has a gold and silver medal to his name. Still, many fans had hoped that the Tokyo Games would be his chance to take home a gold medal finally in the singles category, having won a silver in singles in 2012 and a gold in doubles in 2008.

"I am greatly disappointed, as it has been an honor and highlight of my career each time I have represented Switzerland," Federer said. "I have already begun rehabilitation in the hopes of returning to the tour later this summer. I wish the entire Swiss team the best of luck and I will be rooting hard from afar."