Originally Posted by zagor
On AO surface Berdman is a far bigger threat than Delpo to Fed, that's not to say Delpo doesn't have a chance but I'd favour Fed in that potential match by a solid margin, not so against Berdman (whom I'd favour against Fed actually, should they meet in QF).
This is exactly how I feel. Federer has good memories of facing Del Potro here, and I think this is the one place where the haunting memories of USO 09 don't really effect him. He feels very confident on this surface against Del Potro, the results show.
Berdych though has become a thorn, and Federer does get unhinged against him. He has ended Federer's semi streaks at both Wimbledon and USO already.