Serena Williams may have retired from tennis, but she’s clearly found new ways to keep those knees in action. The iconic tennis star is celebrating […] ‘The Knees Are Kneeing! Werq!’: Serena Williams Shows Off Her ‘Meg Thee Stallion Knees,’ Leaving Fans Stunned After Dropping Way Lower Than Expectedhttp://dlvr.it/TQP8pQ