Novak Djokovic and Roger Federer reach last eight in Dubai
Top seed Novak Djokovic and defending champion Roger Federer both progressed to the last eight of the Dubai Championships with straight-sets wins.
Djokovic extended his unbeaten run to 15 matches with a 6-1 7-6 (7-4) win over Spain's Roberto Bautista-Agut.
"I played a good match for an hour or so, but then I didn't stay committed to every point," said the Serb.
Federer looked far more confident than he had in his opening match, beating Marcel Granollers 6-3 6-4.
"It's something I have been trying my whole life, to be more aggressive," said Federer, who had to come from a set down to beat wildcard Malek Jaziri in the previous round. "I would like to serve-volley more, but I'm winning so it's OK.
"I was sharper. I had a more clear plan. I knew what I could and couldn't do."
Argentina's Juan Martin del Potro beat India's Somdev Devvarman 6-4 6-4 to remain on course for a semi-final tie with Djokovic, while Tomas Berdych of the Czech Republic beat Tobias Kamke of Germany 7-5 6-1.