I was at the match
the atmosphere was insane. I have to thank the Serbian hecklers for firing Amer up - he looked ready to give in tamely before they came and annoyed everyone
After that he had a look on his face, like, "Screw you - not only Serbs could win tennis matches."
Paulo was much better off the ground, of course, but Amer kept playing aggressively and snuck through quite a few lovely winners. The aces column helped him too.