seeded Briton Andy Murray advanced to the fourth round of the 4.5 million-dollar Indian Wells Hardcourt Tennis Tournament on Monday with a 6-3, 6-2 victory over Paul-Henri Mathieu. Murray, who won two titles this year in Doha and Rotterdam before being slowed by a virus, made short work of Mathieu, who reached the semifinals at Brisbane in January but has now failed to win back-to-back matches in six tournaments since. “I hit the ball a lot better than my first match,” Murray said. “I served big when I needed to and moved very well again. Bar a couple of games where I lost my concentration a little bit, it was a very solid match.” Murray needed little more than an hour to finish off Mathieu, breaking him for a 3-1 lead in the second set. Mathieu couldn't capitalize on three break opportunities in the seventh game, and Murray broke him again at 15 in the next to advance to a meeting with either Spain's Tommy Robredo or Marin Cilic of Croatia. Robredo has already won titles in Costa Do Sauipe and Buenos Aires this year, while Cilic triumphed in Chennai and Zagreb. Murray remained on course for a potential semifinal showdown with world number two and second seed Roger Federer. In an early women's match, seventh-seeded Agnieszka Radwanska of Poland advanced with a 6-1, 6-4 victory over Canadian Aleksandra Wozniak. Top-ranked Rafael Nadal needed just 67 minutes to beat Michael Berrer of Germany, 6-2, 6-1 in the second round. Nadal, enjoying his 30th consecutive week at No. 1, had a bye in the first round before overwhelming Berrer, a qualifier ranked No. 112 on the ATP Tour. Nadal lost just five points in seven service games and broke Berrer five times. “For me it was perfect,” said the Spaniard, who will meet Dmitry Tursunov of Russia in the third round. “I played a very comfortable match. I had the break in the first game of both sets. That's really important. I felt well on the court, playing good.” The 26th-ranked Tursunov struggled to a 7-6 (5), 4-6, 6-3 win over American qualifier Michael Russell. Seventh-seeded Andy Roddick didn't play quite as well against Austrian qualifier Daniel Koellerer, but still managed a 6-3, 7-6 (3) win. Fellow American Sam Querrey beat No. 18 Radek Stepanek 6-4, 6-3. No. 8 Juan Martin del Potro moved into the third round with a 6-7 (6), 6-3, 6-1 win over American wild card Ryan Sweeting, while 6-foot-9 John Isner upset ninth-seeded Gael Monfils of France, 6-7 (5), 6-4, 6-4. In the women's draw, top-seeded Dinara Safina, No. 4 Vera Zvonareva of Russia, No. 9 Caroline Wozniacki of Denmark and unseeded American Jill Craybas all won their third-round matches. Safina, who will move to the top of the WTA Tour rankings if she reaches the final round, beat Peng Shuai of China, 7-5, 6-4; Zvonareva, on track for a possible semifinal meeting with Safina, was a 6-3, 6-1 winner over Czech Petra Kvitova; and Wozniacki, Zvonareva's potential quarterfinals foe, beat Kaia Kanepi of Estonia, 6-3, 3-6, 6-3. Craybas, No. 102 in the WTA Tour rankings, ousted Nicole Vaidisova of the Czech Republic, 6-4, 6