Roger Federer and Roger Federer through to the quarterfinals of Qatar Open . Top-seeded Spaniard Nadal defeats Slovenian Gremelmayr of Germany 6 -2 6 -2 . Second seed Federer eases past Slovenian Grega Zemlja 6-2 6-3 in Doha . There are also wins for Spaniard Nadal and Viktor Troicki on last year .
Rafael Nadal and Roger Federer through to the quarterfinals of Qatar Open . Top-seeded Spaniard Nadal defeats Denis Gremelmayr of Germany 6-2 6-2 . Second seed Federer eases past Slovenian Grega Zemlja 6-2 6-3 in Doha . There are also wins for Jo-Wilfried Tsonga and Viktor Troicki on Wednesday .