Credit: Frank Micelotta/Getty Images

Common and Serena Williams have lost at the game of love.

A source close to the couple confirms that the actor/singer, 38, and tennis champ, 28, have ended their relationship.

Behind the split: their busy careers. "They are two workaholics who couldn't see each other enough," the source explains. "Things happen."

Yet just two weeks ago, Common gushed on The Ellen DeGeneres Show about Williams. "Serena and I have been close for about two years," he said. "It's been evolving." He added that he got "emotionally involved" watching Williams on the tennis court.

When DeGeneres asked the star about wedding bells, he said, "I would love to get married and have kids."

A rep for Common (real name: Lonnie Rashied Lynn, Jr.) had no comment.