Friendly exes or they're back together? Serena Williams & Common get cozy

See as they 'lemo' each other..lol. Serena Williams posted the pic on the left of herself & ex-boyfriend Common, showing off the Oscar he won last night for Glory. When fans asked her if they were back together, Serena removed the photo and replaced it with the one she's alone (right).

Serena and Common dated off and on for about three years. He said he almost married her but she ended the relationship. I think they are both single now...