World number one Roger Federer won his first title of the season at the Estoril Open on Sunday after Russia's Nikolay Davydenko retired with a leg injury. The Swiss top seed saved a set point before winning the opener 7-6 and was 2-1 down in the second when number two seed Davydenko announced his decision to retire. “This is not the way you want to win a tournament but that's the way it goes sometimes,” said Federer, who recently hired clay court expert Jose Higueras to help him recover from the worst start to a season since 2000. “I'm sorry about what happened today,” Davydenko told a packed stadium in centee court at the Estoril Open. He later told reporters he planned to play in the prestigious Monte Carlo Masters Series next week. “You know, I have some leg injury and I can't finish the match,” Davydenko, a winner in Estoril in 2003, said. “Sorry guys.” In the women's final, second-seeded Russian Maria Kirilenko won her third career title, beating 2004 Estoril Open finalist Iveta Benesova of the Czech Republic 6-4, 6-2 in a rain-interrupted match. Ferrer bags title Top-seeded David Ferrer rallied to beat Nicolas Almagro 4-6, 6-2, 7-6 (2) Sunday and win the Valencia Open. Ferrer came back from a 5-2 final-set deficit to twice break Almagro's serve and force a tiebreaker. Ferrer improved to 4-0 against the two-time defending champion Almagro, who lost for only the second time in 20 clay matches this season. __