The World No.5 was simply smashing at the Rio Open
Two-time doubles champ to partner fellow Nike endorser.
The Swiss maestro locks up another long-term deal with his hometown tournament.
If Juan Martin del Potro were a superhero, there's one champ he'd choose as sidekick.
The 24-year-old Belgian turned more than a few heads with this masterclass point in Rio.
Davis Cup quarterfinal set for April 7-9th.
Roger Federer and Tomas Berdych play tennis on a boat in Prague.