When you've had a season like Jack Sock's, it can be hard to put on a smile, let alone crack jokes. But the American has a unique sense of humor.

After defeating Elias Ymer at the Stockholm Open, Sock posted a photo of himself with the caption: "I won a singles match lol #AnythingIsPossibe."

It's always nice to see a player have fun with their circumstances, especially Sock who has always been a jokester on tour.

With a singles record of 6-18 this year, the American has only reached the quarterfinals in two tournaments: Stockholm and Houston in April. Fortunately, his doubles career is going much better, winning both Wimbledon and the US Open (with Mike Bryan).

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It doesn't look like his singles season will end much better, as Sock lost to Ernest Gulbis in the quarterfinals in Stockholm.