Later today, the men's final at the U.S. Open will be going down at Arthur Ashe Stadium in Queens, New York. Rafael Nadal will be taking on Novak Djokovic in a battle of the world's first and second ranked players. At their very core, it would seem that hip-hop and tennis don't share much common ground. But that's not true. Diddy (above, from Saturday) was in attendance this weekend cheering on Djokovic in his semifinals match. And he's not the only rapper that's been spotted at major tennis events in recent months. Plus, there have been plenty of related references in lyrics, and some tennis stars have even tried their turn on the mic. Maybe hip-hop and tennis, each with 'Lo heads galore, are really just distant cousins.