He's got an unbelievable backhand. You can't read it, ......

He's got an unbelievable backhand. You can't read it, ... You don't know if he's going up the line or he holds it to go cross-court. He's very talented. He's going to definitely be up there in contention for Grand Slam titles. It was such a tough match. I know that his arm was bothering him. I don't know how bad that was hurting.