i only saw the first two set.s Calleri came out the way he played against Agassi when he spanked him -- he was ripping shots and playing besides himself. Safin did what Jimmy Arias (the commentator i hear on ESPN-I) called a "fake tank" in the first set. everything about his body language broadcasted that he was going to just tank the flipping match. i wanted to choke him. then next thing you know Safin settles down and starts playing beautiful tennis, big serves, lovely touches. he just got into the groove. and mainly Calleri started running out of energy. on any other surface, most of his shots would have been winners, but on clay Safin was returning like a monster. up to the point that i saw, Calleri was not injured -- just frustrated, demoralized and de-energized.
by the way Safin now sports an interesting beard-mustache combo. it makes him look hot.