Thursday marks Roger Federer's 38th birthday, and with his absence at the Roger's Cup this week, he'll get to celebrate it in full force.

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His fans, friends and colleagues took to social media to wish him well.

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Federer's former coach Paul Annacone may win for coolest group photo:

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Federer shares a birthday with 19-year-old Felix Auger-Aliassime, who's into the round of 16 in Montreal. Pete Sampras turns 48 on Monday, and he shares a birthday with Stefanos Tsitsipas.

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The world No. 3 hasn't played since falling in the Wimbledon final to Novak Djokovic, but is expected to compete in Cincinnati next week.