Indian Wells Masters 1000
Date: 12-22 March Coverage: Live on Sky Sports, updates on BBC Radio 5 Live with text commentary on BBC Sport website
Nadal has won three of the last four Grand Slam titles
World number one Rafael Nadal and defending champion Novak Djokovic remain on course for a semi-final clash after third-round wins in Indian Wells.
Djokovic moved into the last 16 of the Masters 1000 tournament with a 6-2 7-6 (7-1) win over Germany's Tommy Haas.
And Nadal then swept past Russian Dmitry Tursunov 6-3 6-3.
In the women's event, top seed Dinara Safina beat Jill Craybas 7-5 6-4 and title holder Ana Ivanovic defeated Flavia Pennetta 6-4 4-6 6-4.
Ivanovic will play Austria's Sybille Bammer in the last eight after the Austrian saw off former champion Daniela Hantuchova 6-3 6-2.
Safina goes on to face Victoria Azarenka of Belarus, who beat Israel's Shahar Peer 7-5 6-4.
Russia's Vera Zvonareva surged into the quarter-finals with a 6-4 6-4 win over Li Na and will play Caroline Wozniacki in the last eight after the Danish ninth seed beat Poland's Urszula Radwanska 7-5 6-3.
It got a bit intense out there - we saw some racquets broken, on his side and mine, and a bit of swearing
Former junior world number one, Anastasia Pavlyuchenkova, 17, who beat second seed Jelena Jankovic in the last round, was leading Nuria Llagostera Vives 6-3 3-0 when the Spaniard retired with a hip strain.
Nadal had little trouble in seeing off Tursnov, while admitting "It wasn't one of my best matches", and he will now attempt to beat David Nalbandian - a 6-4 6-2 winner against Viktor Troicki - for the first time in their third meeting.
"I didn't play well the last two times," said Nadal. "I have to be ready because if he has control of the point it's going to be almost impossible."
Djokovic and Haas enjoyed a fiery encounter as the Serb set up a clash with Switzerland's Stanislas Wawrinka, who beat Sam Querrey 2-6 7-5 7-6 (10-8).
"It got a bit intense out there - we saw some racquets broken, on his side and mine, and a bit of swearing," stated Djokovic. "I hope the people didn't hear that."
Sixth seed Juan Martin del Potro beat Jurgen Melzer 6-2 2-6 7-6 (7-2) and goes on to face John Isner, who defeated Marat Safin 6-4 6-4.
Seventh seed Andy Roddick saw off Nicolas Kiefer 6-4 7-6 (7-4), and the American will take on 12th seed David Ferrer after the Spaniard beat Jeremy Chardy 3-6 6-4 6-4.
In the doubles, Andy Murray and Ross Hutchins reached the quarter-finals with a 6-1 6-3 win over Marcelo Melo and Andre Sa.
The British pair were rarely troubled as they wrapped up victory in under an hour and they will now face Belarusian Max Mirnyi, former doubles partner of Andy's brother Jamie, and Andy Ram of Israel.