OEIRAS, Portugal: Juan Martin del Potro of Argentina beat Fernando Verdasco of Spain 6-2, 6-2 in the Estoril Open final Sunday, claiming victory in his first clay-court event of the year. It was the former US Open champion's 10th career win and his second title since recovering from wrist surgery last year. Del Potro improved his record since his return to 23-3. He has risen from No. 484 in February to his current ranking of No. 46. Djokovic wins Serbia Open Novak Djokovic defeated Feliciano Lopez 7-6 (4), 6-2 on Sunday to win the Serbia Open for his fifth title and 27th straight victory this season. The Australian Open champion was not always at his best in a match often played in rain and had six double faults. “You people make it worth to come back to this city and play and hope for the victories,” said Djokovic, who led Serbia's Davis Cup team to its first ever victory last year. Djokovic has had the best start to an ATP tour season since Ivan Lendl in 1986. Davydenko beats Mayer Nikolay Davydenko beat Florian Mayer of Germany 6-3, 3-6, 6-1 to win his second BMW Open title Sunday. The seventh-seeded Russian also won the Munich tournament in 2004. Wozniacki, Sharapova advance Caroline Wozniacki was untroubled in advancing to the second round of the Madrid Open on Sunday, while Maria Sharapova had to rally to beat Arantxa Rus 2-6, 6-3, 6-2. The top-seeded Wozniacki did not give Ayumi Morita of Japan a single break opportunity as the Danish player rolled to a 6-2, 6-3 win at the clay-court event. In the men's first round, Jo-Wilfried Tsonga of France overpowered 10th-seeded Nicolas Almagro 6-1, 6-3 after breaking the Spaniard four times. The 14th-seeded Guillermo Garcia-Lopez defeated Stanislas Wawrinka 6-4, 5-7, 6-4, and Santiago Giraldo downed Alexandr Dolgopolov of the Ukraine 6-1, 7-5. In other women's first-round action, Arantxa Parra Santonja ousted former top-10 player Flavia Pennetta of Italy 6-3, 7-5. Sara Errani of Italy ousted sixth-seeded Klara Zakopalova 7-6 (4), 6-4 while Bethanie Mattek-Sands rallied to beat 15th-seeded Ana Ivanovic of Serbia 0-6, 6-4, 6-4. Third-seeded Francesca Schiavone, seventh-seeded Jelena Jankovic and 11th-seeded Marion Bartoli also won.