Serena Williams and Drake's Restaurant Makeout Sesh

TMZ
Drake and Serena Williams were getting cozy in Cincinnati (TMZ.com)
Drake and Serena Williams were getting cozy in Cincinnati (TMZ.com)

Game. Set. Smash.

Here it is… proof Drake and Serena Williams are officially a thing — making out at a fancy Cincinnati restaurant Sunday night ... and TMZ has the pics.

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Hours after Serena dominated and won the WTA tournament in Cinci — with Drake in the crowd — the two hit up the uber-fancy Sotto restaurant in downtown for some hoity-toity Italian food (the porterhouse is $85).

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The two had a private room in the back of the eatery — where they couldn't keep their hands and lips off of each other... while several patrons watched.

People inside the restaurant tell us the two were joined by six other people... and at one point ordered a round of tequila shots for the table.

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There have been rumors about the two hookin' up for months — ever since Drake was spotted cheering for Serena at Wimbledon — but now the pics confirm it... it's game on.