LONDON, June 25 (Agencies): Defending champion Rafael Nadal beat Gilles Muller in straight sets Saturday to reach the fourth round at Wimbledon, committing only three unforced errors in a masterful display that keeps the Spaniard on course for a third title at the All England Club.
In a match that had been suspended after the first set because of darkness Friday, Nadal hit 36 winners and never lost serve to defeat the 92nd-ranked wild card from Luxembourg 7-6 (6), 7-6 (5), 6-0 on Court 1.
Muller is the last player other than Roger Federer to beat Nadal at Wimbledon, in the second round in 2005.
Nadal will next face another Grand Slam champion, 2009 U.S. Open winner Juan Martin del Potro, who beat Gilles Simon 7-6 (8), 7-6 (5), 7-5. The Argentine missed most of 2010 after surgery on his right wrist.
In women�s play, 2004 champion Maria Sharapova and top-seeded Caroline Wozniacki won in straights set to reach the round of 16.
Nadal, who saved two break points in the first set Friday against Muller, was credited with zero unforced errors Saturday in the 2nd set. But Muller managed to stay even until he sliced a backhand into the net after a long rally to give Nadal a 6-5 edge in the tiebreaker. The Spaniard closed the set in the next game with a forehand winner, then won six straight games, finishing with an ace.
Sharapova struggled with her game but reached the fourth round by beating Klara Zakopalova 6-2, 6-3. The fifth-seeded Russian, the only champion in the women�s draw other than the Williams sisters, had 21 unforced errors and four double-faults in an inconsistent baseline performance in the wind on Court 2.
But, after falling behind 3-1 in the second set, Sharapova lifted her game to win five games in a row to finish off the 35th-ranked Czech player. Zakopalova had trouble with her footing, slipping at least four times along the baseline. Sharapova pumped her fist and shouted �Come on!� after hitting a forehand service return winner to break for 5-3 in the second set, then finished the match in the next game with another forehand winner down the line. Sharapova hasn�t reached the semifinals since 2006. She will next face 20th-seeded Peng Shuai of China, who beat Melinda Czink of Hungary 6-2, 7-6 (5).
Wozniacki, still looking for her first Grand Slam title, swept Jarmila Gajdosova 6-3, 6-2 to make the fourth round for the third straight year. Wimbledon is the only major championship in which the Dane has not reached at least the quarterfinals. Also advancing to the final 16 among the men was last year�s runner-up, Tomas Berdych. The sixth-seeded Czech needed only seven points to complete a 6-2, 6-4, 6-3 win over Alex Bogomolov Jr. of the US. The match had been suspended because of rain with Berdych leading 4-3, 15-0 in the third set Friday.
Ninth-seeded Gael Monfils lost to 93rd-ranked Polish qualifier Lukasz Kubot 6-3, 3-6, 6-3, 6-3. Kubot, who won three qualifying matches to get into the main draw, also reached the round of 16 at the 2010 Australian Open.