Caroline Wozniacki from Denmark returns the ball during her Madrid Open tennis tournament match against Bojana Jovanovski from Serbia in Madrid, Tuesday. (AP) MADRID: Top-ranked Caroline Wozniacki advanced to the third round of the Madrid Open by beating Bojana Jovanovski of Serbia 6-4, 6-4 Tuesday. Wozniacki broke her opponent twice in the first set and three times in the second, while saving eight of the 11 break points she faced. “Jovanovski is very young and I hadn't played her before,” Wozniacki said. “She made some unforced errors, although later in the match she got better and didn't make it easy for me.” Samantha Stosur of Australia also advanced, beating Daniela Hantuchova of Slovakia 7-6 (1), 7-5. Stosur also beat Hantuchova in Stuttgart last month. “I've played some of my best matches of the year on red clay so I'm happy,” Stosur said. On the men's side, Juan Martin del Potro of Argentina overcame a hip problem to beat 13th-seeded Mikhail Youzhny of Russia 6-1, 3-6, 6-3 to reach the second round, while Jo-Wilfried Tsonga of France defeated Pere Riba of Spain 6-4, 6-2 to make the third round. Del Potro, the 2009 US Open champion who missed much of last season after having wrist surgery, appeared to struggle in the second set and called a physiotherapist for on-court treatment. “I have some pain in my hips and I've been trying to play through it, trying to win despite the pain,” Del Potro said. The Argentine player said he has been struggling with the problem since winning Sunday's Estoril Open final against Fernando Verdasco. If del Potro wins his next match against Croatian player Marin Cilic he could meet top-ranked Rafael Nadal. “First I have Cilic and we know each other quite well so it will be a very difficult match for both of us. Let's hope I am well enough to play good tennis and beat him,” del Potro said. Sixth-seeded David Ferrer of Spain advanced to the third round after overcoming Adrian Mannarino of France, 7-5, 0-6, 6-0. Ferrer will play Sergiy Stakhovsky for a place in the last 16. Ukrainian Stakhovsky edged past big-serving American John Isner 7-5, 4-6, 7-6 earlier Tuesday in a match featuring only one break of serve for each player. Verdasco, another Spaniard, was upset 7-6, 7-5 by unseeded Lu Yen-Hsun of Taiwan, while local wildcard Marcel Granollers eliminated Russia's Nikolay Davydenko 7-5 6-2. France's Gilles Simon won a tight match against Croatian Ivan Ljubicic 7-5, 7-6 to set up a second-round meeting Wednesday with fourth-seeded Briton Andy Murray. Second and third seeds Novak Djokovic and Roger Federer play their opening matches against Kevin Anderson of South Africa and Spain's Feliciano Lopez respectively Wednesday. Lopez ended the hopes of Canada's Milos Raonic with a 4-6, 7-6, 6-4 victory Tuesday, when Anderson saw off Belgium's Olivier Rochus 6-2, 6-4. On Monday, former world No. 1 Andy Roddick was dumped out in the first round, upset 6-4, 6-7, 6-3 by qualifier Flavio Cipolla. The American 12th seed had his serve broken four times by the Italian ranked 148 places below him at number 160. Roddick's friend and compatriot Mardy Fish, the 12th seed, was also eliminated in the first round, losing 7-6, 4-6, 7-6 to fellow American John Isner.
