Don't worry. Nole just beat Murray 6-2 in a practice match yesterday. I'm a Nole fan, and I can't remember the last time Nole actually beat Murray in a real match on hard courts.
This practice stuff is obviously not serious. If Nalby beat Nole 6-2 in a practice session, I wouldn't get too excited. Their coaches keep score and it is pretty low key.
I also read Rafa was going at 100% and David was wearing a Rolex.