Federer, 34, underwent knee surgery in February before missing May's French Open with a back problem, and the Swiss star said he was calling time on his 2016 season to focus on his recovery.
Federer ends Willis's Wimbledon fairytale
"I'm extremely disappointed to announce that I will not be able to represent Switzerland at the Olympic Games in Rio and that I will also miss the remainder of the season," Federer said on his Facebook page.
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