Expected result. Rosol could have been two sets up (led by a break in second set) and had two points on serve to win TB. He was agressive, punishing both of Nadal's serves and short balls ruthlessly. Nadal was nervous, dumping a weak FH into the net to get broken - the only service break in 1st set.
After Nadal won the second, he visibly relaxed and as the match went on, became more and more untouchable on serve, while Rosol looked visibly frustrated, his level dipping. One break in 3rd and 4th is all it took to lose - he lost his serve to love in 4th set,
Match verdict: best I've seen nadal play on grass in a long time. 3rd and 4th set was 2013 USO level serving and he started hitting flatter and deeper as the match went on.