Top-ranked Victoria Azarenka held off Andrea Hlavackova's challenge to win 6-3, 7-6(2) after Maria Sharapova beat Klara Zakopalova 6-4, 6-3 to reach the third round of the Madrid Open on Tuesday.
On the men's side, Milos Raonic, the World No.23, defeated David Nalbandian 6-4, 6-4 in a first round match on Tuesday. He now plays third seed Roger Federer.
Jurgen Melzer upset 13th-seeded Spaniard Feliciano Lopez 3-6, 7-6(6), 6-4 to advance to the second round where he meets Stanislas Wawrinka, who dismissed Olivier Rochus 6-4, 7-6(3).
World No. 11 Juan Martin del Potro, fresh off his title win at Estoril over the weekend, beat Florian Mayer 6-4, 6-2 to also make it through to the second round.
In doubles, Sania Mirza and Anastasia Rodionova suffered an upset first round exit after losing to Anna-Lena Groenefeld and Shuai Zhang.
The sixth seed Indo-Australian combination lost 3-6, 2-6 to German-Chinese combination in the opening round.
India beats Hong Kong
Pranjala Yadlapalli won both her singles and doubles matches to guide India to a 3-0 victory over Hong Kong in a league match of the Asia-Oceania World junior under-14 girls' tennis tournament in Kuching, Malaysia, on Tuesday.
Fourth-seeded India will play fifth-seeded Korea on Wednesday to decide the group topper.
The top two teams from the four groups will qualify for the quarterfinals and the best four will make the World finals to be played in the Czech Republic.
The results: Asia-Oceania World junior girls' tournament (league): India bt Hong Kong 3-0 (Himani Mor bt Hei Ching Claudia Ng 6-1, 6-1; Pranjala Yadlapalli bt Jacinta Yuan Sze Chen 6-1, 6-0; Vanshika Sawhney and Pranjala Yadlapalli bt Wai Lam Ip and Hei Ching Claudia Ng 6-2, 6-3).
Madrid Open: Men: First round: Jurgen Melzer bt Feliciano Lopez 3-6, 7-6(6), 6-4; Gilles Simon bt Fabio Fognini 6-7(1), 6-3, 6-3; Milos Raonic bt David Nalbandian 6-4, 6-4; Marcel Granollers bt Carlos Berlocq 7-5, 3-6, 7-5; Juan-Martin del Potro bt Florian Mayer 6-4, 6-2; Gael Monfils bt Philipp Kohlschreiber 7-5, 6-7(2), 6-3; Fernando Verdasco bt Denis Istomin 7-5, 6-2.
Federico Delbonis bt Albert Ramos 6-3, 6-2; Radek Stepanek bt Bernard Tomic 6-2, 7-5; Marin Cilic bt Albert Montanes 6-3, 6-3; Andreas Seppi bt Michael Llodra 7-5, 6-4; Stanislas Wawrinka bt Olivier Rochus 6-4, 7-6(3); Alexandr Dolgopolov bt Pablo Andujar 7-6(5), 6-4.
Women:Second round: Ana Ivanovic bt Nadia Petrova 7-5, 6-1; Lucie Safarova bt Carla Suarez Navarro 6-3, 6-4.
Maria Sharapova bt Klara Zakopalova 6-4, 6-3; Victoria Azarenka bt Andrea Hlavackova 6-3, 7-6(2); Petra Cetkovska bt Lourdes Dominguez Lino 6-4, 7-5; Samantha Stosur bt Christina McHale 2-6, 6-4, 6-0; Li Na bt Silvia Soler-Espinosa 6-3, 6-1; Angelique Kerber bt Venus Williams 6-4, 6-1.
