Lebron James' longterm girlfriend has been accused of sleeping with Rashard Lewis, which has led to the Miami Heat's stars poor performance on the court.

While ESPN's analyst Stephen A. Smith claimed during his radio show that the basketball star was having some personal issues which could be causing his problems on the court, and Nette at 97.9 The Box claimed that a source told her about the alleged affair.

During the radio show, she said: "I have a very reliable source who clubs and drinks with all of the athletes that come through Orlando. He was all over the Tiger Woods issue and knew what all happened with Tiger prior to it being released publicly.

My buddy has a place in Orlando, Lake Nona to be exact, and he lives among some athletes that live there in Orlando. Needless to say he golfs, drinks, and parties with some of the best people in central Florida. So when word got to him while at the bar last night, he called me. Word got out while drinking with friends, that Rashard Lewis slept with Lebrons girl while visiting South Beach."

Lebron James and girlfriend Savannah...