Well i think he thinks Federer has sex appeal.
. He like Federer's big balls and horrible body hair.
The funny thing is Berdych is not actually a typical good looking guy, he is a bit off, which actually makes him sexy.
Well, I don't know if sexy is the right word for Berdych either. Certainly he's handsome & cute, but for me he's the sort you'd date and have as a BF rather than jump into bed with immediately if that makes sense