Serena Williams Boyfriend 2013: Patrick Mouratoglou Stares At Booty On Tennis Court? [VIEW PHOTO] Rumored Boyfriend Tweets Pic

Serena Williams' coach and rumored boyfriend, Patrick Mouratoglou, posted a picture of the couple via Twitter on Monday, where the French tennis celebrity appears to be checking out her backside. 

The photo, originally posted on Facebook, was released through Patrick Mouratoglou's blog in an album entitled "Roland Garros 2013."

Several other photos snapped of Serena Williams on tennis courts during competitions were included in the album. 

Serena Williams and Patrick Mouratoglou arrived at Bastad last weekend, where she will compete in the Collector Swedish Open. 

She is slated to face Sesil Karatancheva in the first round on Tuesday. 

But Serena Williams is also expected to face Andy Murray in a "Battle of the Sexes" challenge in what began as a Twitter joke, leaving tennis fans wondering who coach and rumored boyfriend Patrick Mouratoglou will root for.

Patrick Mouratoglou frequently tweets about Andy Murray, complimenting his performance in Wimbledon and his overall style in tennis, but is also a staunch supporter of Serena Williams and is speculated to be in a romantic relationship with her.

Williams suggested before she was dethroned as women's champion at Wimbledon that she would be prepared to take on Murray, who proposed Las Vegas as a potential location for any match between them, the Telegraph reports.

It is understood that several venues in Vegas would be interested in ­hosting what would be a re-enactment of two famous male-female tennis showdowns of the 1970s and one in the 1990s, the Telegraph also reports.