There's a good chance Dallas Mavericks coach Rick Carlisle and Oklahoma City Thunder center Kendrick Perkins won't be direct messaging each other on Twitter. In the heat of the battle Monday night, Carlisle was on the court exchanging some unpleasant shout-outs with Perkins. That red-hot conversation came shortly after Carlisle said Perkins instigated a dust-up with forward Dirk Nowitzki when Carlisle claimed Perkins threw an elbow at the Mavericks' 11-time All-Star. And that came shortly after Thunder forward Serge Ibaka popped Nowitzki in the face on a jump shot.