JM Del Potro is sooo fast in this game. It doesn't make much sense to me. He returns everything that you hit, and returns it deep and near or on the lines... He's a better returner than Murray, or Djokovic on this game for me. I'm not sure why this is the case. Also it always seems like no matter how well I anticipate, my shots are much shorter than the CPU's.. It's irritating during a rally, where I'd hit brilliant shots, only to have the CPU return the ball deep, when they were in no position to do so originally. Thanks.