2. Murray - He has found the formulae to beat fed now on all surfaces. The last two meetings were straight easy beat downs. They weren't even really that close. You never felt federer could come back and federer just felt over powered and was shanking forehands and backhands.
3. Berdych - Berdych is the poorman's kryptonite. He can beat fed, but really not anyone else in the top 4.