Agreed mrzz. The slice was very tricky and almost impossible to produce a quality shot off of but if I were Grigor I would have just sliced it back, even with the forehand.
Nadal's cross court backhand is what's keeping him alive in the rallies. It's allowing him to change the dynamics. Dimitrov has went to that side so much he's played it into form. Rafa's forehand is awful this match and Grigor should look to exploit that