<p>World number one Nadal, losing finalist to Novak Djokovic at Indian Wells, California, defeated compatriot Feliciano Lopez for the seventh time in nine matches, 6-3, 6-3. Federer, seeded third, played a tight first set but broke it open in the second to defeat clay-courter Juan Monaco 7-6 (7-4), 6-4.<br /><br />The Federer used his all-court game to expose the limitations of the Argentine, whom he last played four years ago.<br /><br />"You're trying to mix up the game to see how he reacts to shorter rallies, to shots hit shorter and longer, instead of always going laterally. I was able to do that," Federer said.<br /><br />"He struggled a bit with that, because he's a very good rhythm player. I kept the points short, because I thought he doesn't quite like that - that's how I like to play."<br />Nadal, twice a losing finalist, has reached the quarter-finals or better in five of seven attempts at Miami.<br /><br />Seventh-seeded Wimbledon finalist Tomas Berdych defeated Carlos Berlocq 7-6 (10-8), 7-5.<br /><br />German players split in Miami, with Florian Mayer putting out 11th seed Nicolas Almagro 6-1, 3-6, 6-1, while Serb Janko Tipsarevic stopped Philipp Petzschner 6-3, 6-3.<br /><br />In the women's draw, Germany's Andrea Petkovic sent top seed Caroline Wozniacki out 7-5, 3-6, 6-3.<br /><br />Petkovic became the first German woman to defeat a number one in a completed WTA match since Steffi Graf beat Martina Hingis in the 1999 French Open final.<br /><br />"It was not like I played unbelievable," said the winner. "It was more that I was able to stick to my game plan, and I was playing clever. That was the key to the match."<br />Russian third seed Vera Zvonareva turned around a losing cause to defeat French 15th seed Marion Bartoli 2-6, 6-3, 6-2.<br /><br />Number six Jelena Jankovic was untroubled by Spain's Anabel Medina Garrigues 6-1, 6-3. Russian 16th seed Maria Sharapova staged an upset of her own with a defeat of Australian fourth seed Samantha Stosur 6-4, 6-1.<br /><br />The 23rd-ranked Petkovic, who lost an Australian Open quarter-final to eventual finalist Li Na, needed an hour to lift the opening set as she fired an ace to clinch the early lead.<br />Wozniacki, who had been bidding for the US spring double after winning Indian Wells a week ago, claimed the second, but her German opponent hung tough in the third.<br /><br />Petkovic sent up a break for 4-2 as the top seed from Denmark netted a backhand. The challenger stayed the course and served out the victory three games later with her third ace, after saving a dozen of 17 break points she faced on the afternoon.<br />The seed finished with a massive 52 unforced errors.<br /><br />"Nothing was going on with my forehand, nothing was going on with my backhand," said Wozniacki.<br /><br />"I lost the match. She played a good match. I've been playing a lot of matches, but I've been doing so well. Today I just took some wrong decisions."</p>
<p>World number one Nadal, losing finalist to Novak Djokovic at Indian Wells, California, defeated compatriot Feliciano Lopez for the seventh time in nine matches, 6-3, 6-3. Federer, seeded third, played a tight first set but broke it open in the second to defeat clay-courter Juan Monaco 7-6 (7-4), 6-4.<br /><br />The Federer used his all-court game to expose the limitations of the Argentine, whom he last played four years ago.<br /><br />"You're trying to mix up the game to see how he reacts to shorter rallies, to shots hit shorter and longer, instead of always going laterally. I was able to do that," Federer said.<br /><br />"He struggled a bit with that, because he's a very good rhythm player. I kept the points short, because I thought he doesn't quite like that - that's how I like to play."<br />Nadal, twice a losing finalist, has reached the quarter-finals or better in five of seven attempts at Miami.<br /><br />Seventh-seeded Wimbledon finalist Tomas Berdych defeated Carlos Berlocq 7-6 (10-8), 7-5.<br /><br />German players split in Miami, with Florian Mayer putting out 11th seed Nicolas Almagro 6-1, 3-6, 6-1, while Serb Janko Tipsarevic stopped Philipp Petzschner 6-3, 6-3.<br /><br />In the women's draw, Germany's Andrea Petkovic sent top seed Caroline Wozniacki out 7-5, 3-6, 6-3.<br /><br />Petkovic became the first German woman to defeat a number one in a completed WTA match since Steffi Graf beat Martina Hingis in the 1999 French Open final.<br /><br />"It was not like I played unbelievable," said the winner. "It was more that I was able to stick to my game plan, and I was playing clever. That was the key to the match."<br />Russian third seed Vera Zvonareva turned around a losing cause to defeat French 15th seed Marion Bartoli 2-6, 6-3, 6-2.<br /><br />Number six Jelena Jankovic was untroubled by Spain's Anabel Medina Garrigues 6-1, 6-3. Russian 16th seed Maria Sharapova staged an upset of her own with a defeat of Australian fourth seed Samantha Stosur 6-4, 6-1.<br /><br />The 23rd-ranked Petkovic, who lost an Australian Open quarter-final to eventual finalist Li Na, needed an hour to lift the opening set as she fired an ace to clinch the early lead.<br />Wozniacki, who had been bidding for the US spring double after winning Indian Wells a week ago, claimed the second, but her German opponent hung tough in the third.<br /><br />Petkovic sent up a break for 4-2 as the top seed from Denmark netted a backhand. The challenger stayed the course and served out the victory three games later with her third ace, after saving a dozen of 17 break points she faced on the afternoon.<br />The seed finished with a massive 52 unforced errors.<br /><br />"Nothing was going on with my forehand, nothing was going on with my backhand," said Wozniacki.<br /><br />"I lost the match. She played a good match. I've been playing a lot of matches, but I've been doing so well. Today I just took some wrong decisions."</p>