seeded Andy Murray advanced in a walkover Sunday at the Sony Ericsson Open when Milos Raonic withdrew because of a sprained right ankle. Raonic said he doesn't believe the injury is serious. Murray, the 2009 champion, moved into the fourth round. Grigor Dimitrov advanced by upsetting No. 7 Tomas Berdych 6-3, 2-6, 6-4 for his first win over top 10 opposition at the 10th time of trying. No. 9 Janko Tipsarevic beat No. 18 Alexandr Dolgopolov 6-4, 5-7, 6-2. In women's third-round play, No. 7 Marion Bartoli eliminated Simona Halep 6-4, 7-6, (6). No. 16 Dominika Cibulkova beat Zheng Jie 6-2, 6-0. On Saturday, on the verge of victory, Roger Federer stopped playing when he thought a pivotal point had ended. He mistook a fan's shout for a linesman's call, which cost him the game. Play continued for another 25 minutes before Federer finally closed out his opening match by beating 19-year-old American Ryan Harrison 6-2, 7-6 (3). Maria Sharapova and Novak Djokovic won in more straightforward fashion, but two-time champion Kim Clijsters was eliminated. The No. 3-seeded Federer's opponent in the third round will be another American, familiar foil Roddick. They've played 23 times and Roddick has won only twice, although he did beat Federer at Key Biscayne in 2008. The top-seeded Djokovic, who won the tournament in 2007 and 2011, improved to 7-0 against Marco Baghdatis by winning 6-4, 6-4. Sharapova, seeded second, beat American qualifier Sloane Stephens 6-4, 6-2. Clijsters, coming back from an ankle injury, lost to Belgian compatriot Yanina Wickmayer 6-4, 7-6 (5). Former No. 1 Caroline Wozniacki beat No. 29-seeded Petra Cetkovska 6-3, 7-5. Reigning French Open champion Li Na defeated Iveta Benesova 7-5, 6-2 and Samantha Stosur, last year's US Open winner, rallied past Chanelle Scheepers, 2-6, 7-5, 6-2. No. 8 Mardy Fish was among 15 seeded men to advance. One lost: No. 15 Feliciano Lopez was beaten by fellow Spaniard Albert Ramos, 6-4, 7-6 (5). Men's fifth seed David Ferrer, another hot player on the men's tour with three titles this year, converted four of 10 break point opportunities to beat 19-year-old Australian Bernard Tomic 6-4, 6-4. France's Gael Monfils defeated Ukrainian qualifier Sergei Bubka 6-4, 6-4 in 78 minutes.
