Federer with a potentially tough draw folks.
Qualifier Carreno-Busta is a big clay talent. A future RG champion in the making... He could upset Federer if he is on and Federer isn't quite ready.
Devverman is from India, the land of Sachin Tendulkar, and they were co-recipients of SI's SportsPerson of the Year award. Need we say more? He could give Federer trouble on aura alone.
Benneteau usually plays well against Federer and is a relatively tough match-up for him.
Simon/Hewitt can be troublesome for someone like Federer, Hewitt alone has 2 majors and Simon is still starving.
Tsonga is dangerous when on his game; his effort last year at RG vs. Djokovic won't be forgotten.
Ferrer is a beast on clay and has played Nadal the closest this year at the important clay tournaments. If he can beat Federer/whomever, he'll make the final.
Nadal is God at RG.
Federer will be very thankful to make past each round.