Two #USOpen champions are better than 1. @marincilic_official breezes into R3 while @rogerfederer preps for day 4, at 2:15pm ET, and will face M. Youzhny. Tune-in all week to @espn & @tennischannel. __ #federer #marincilic #cilic #rogerfederer #instasport #NYC #tennis #champions #menatwork