Not this crap again.
Federer's backhand is one of the main reasons why he won 17 majors in the first place. Good chance that he would win much less with a 2 hander.
You basically broadcasted how shallow your knowledge in tennis is. He has one of the best backhands in the game. The notion that the OHBH is the devils work and above all useless and that you can only win with 100 sq inch snowshoes is just that: senseless drivel.