Serena and Venus Williams ended lengthy breaks for knee problems with straight-sets victories over Swiss players in their opening matches at the Italian Open Tuesday. Defending champion Dinara Safina, recovered from a back injury, lost her opener against Alexandra Dulgheru of Romania 6-4, 6-7 (5), 6-1. Top-ranked Serena defeated Timea Bacsinszky 7-6 (2), 6-1 in her first match since winning the Australian Open more than three months ago. No. 4-ranked Venus, taking to the center court at the Foro Italico just before her sister, handled veteran Patty Schnyder 6-2, 6-2. In other results Tuesday, second-ranked Caroline Wozniacki dispatched Italian Maria Elena Camerin 6-1, 6-0, while former French Open champion Ana Ivanovic upset Victoria Azarenka, the ninth seed from Belarus, 6-4, 6-4. Also Tuesday, two-time former champion Jelena Jankovic defeated Bethanie Mattek-Sands of the US 6-3, 3-6, 6-1, sixth-seeded Elena Dementieva of Russia beat Kazakh player Yaroslava Shvedova 6-4, 7-5 and Lucie Safarova of the Czech Republic brushed aside local hope Flavia Pennetta 6-1, 6-2. Eighth-seeded Agnieszka Radwanska beat Roberta Vinci of Italy 6-1, 6-0, and Shahar Peer of Israel came from behind to beat Polona Hercog of Slovenia 2-6, 7-5, 6-3. Baghdatis advances In Germany, former Australian Open finalist Marcos Baghdatis had to come from a set down to book his place in the second round of the Munich ATP tournament Tuesday before heavy rain affected play. The 24-year-old made a slow start to the game with seven double faults in the first set alone, but rallied for an ultimately comfortable 3-6, 6-1, 6-2 win over Germany's Peter Gojowczyk. Germany's Nicolas Kiefer made a first-round exit at the hands of compatriot Simon Greul, 7-5, 6-2. Heavy afternoon rain forced the remaining matches to be postponed until Wednesday. Gasquet, Seppi advance In Serbia, Richard Gasquet of France and eighth-seeded Andreas Seppi of Italy advanced Tuesday to the second round of the Serbia Open. Gasquet routed Olivier Rochus of Belgium 6-0, 6-1, while Seppi rallied to beat Leonardo Mayer of Argentina 2-6, 6-1, 6-4. Serbian wild card Filip Krajinovic scored his first ATP Tour victory by defeating Evgeny Donskoy of Russia 5-7, 7-6 (7), 6-1. Italy's Alessio Di Mauro saved two match points before downing Marko Djokovic of Serbia 6-7 (5), 7-5, 6-0. Mayer upset In Portugal, Frederico Gil of Portugal, ranked 120th in the world, upset sixth-seeded Florian Mayer 6-2, 6-7 (5), 6-3 in the first round of the Estoril Open Tuesday. Fifth-seeded Guillermo Garcia-Lopez beat Xavier Malisse 6-2, 7-6 (7), and eighth-seeded Pablo Cuevas of Uruguay rallied to defeat Pablo Andujar of Spain 1-6, 7-5, 6-0. In the women's event, second-seeded Sorana Cirstea overcame Iona Raluca Olaru 6-3, 3-6, 6-1. Fourth-seeded Anabel Medina Garrigues trounced Portugal's Magali de Lattre 6-0, 6
