I watched the match on tape just some minutes ago.
Marat lost not because Calleri made him do something extra or anything. This lost, unlikely last week vs Guga, was totally Marat´s fault.
He started lazy and slow, as Agustin got an early break. Safin managed to come back and take it to tiebreak, which he led 4-0, before he gave it away on a 8-6.
In the second set, once again he got a big lead, 3-0 and then 4-1 and then got broke on 4-2 and after 40-15 lead.
He broke a racket, complained about the calls (some of them were indeed terrible) and even had a very loud argument with Romano Grilloti (sp?) the chair umpire.
Very sad loss, I just hope he gets a way to bounce back, since this part of the season should be good for him, and not a struggle.
What a shame, his draw was quite good as well.
Anyway, we now have to wait yet another week...