Dinara Safina turned her first match as No. 1 in the world into a rout, overwhelming Sara Errani 6-0, 6-1 on Tuesday to reach the second round of the Porsche Grand Prix. Second-seeded Elena Dementieva also advanced by beating Anna-Lena Groenefeld 6-4, 3-6, 6-3. The Russian, who won the Olympic gold medal in Beijing last year, broke serve for a decisive 3-1 lead in the final set after dropping the second. “It was a difficult match to play, with lots of ups and downs,” Dementieva said. “I lost my concentration in the second set.” Seventh-seeded Caroline Wozniacki of Denmark beat Iveta Benesova 6-3, 7-5 and eight-seeded Agnieszka Radwanska of Poland also advanced, beating Aleksandra Wozniak of Canada 7-6 (2), 6-0. Marion Bartoli of France beat qualifier Karolina Sprem of Croatia 6-3, 2-6, 6-1 after overcoming stomach muscle problems in the second set. Four other unseeded players also advanced. Li Na defeated Peng Shuai of China 6-2, 6-3, Tsvetana Pironkova of Bulgaria rallied to beat Albert Brianti of Italy 0-6, 6-4, 6-4, Agnes Szavay of Hungary defeated Ai Sugiyama of Japan 6-3, 2-6, 7-6 (4) and Gisela Dulko of Argentina beat Magdalena Rybarikova of Slovakia 6-3, 6
