it was all mental; Fed knew JB couldn't (yet?) sustain the game he had in the first several games, and the worst for Blake was he knew that himself
the lack of variety in intensity in JB is his undoing; Fed cooked him slowly, cooked him faster, and then exploded ...
Great fitness sites http://tt.tennis-warehouse.com/showthread.php?t=15571
"Simon and Hiroko": My Novels on Amazon