Nuremberg - German players Angelique Kerber and Sabine Lisicki have advanced to the second round of the Nuremberg Cup by winning their opening matches at the clay-court tournament on Monday.
The second-seeded Kerber defeated Rebecca Peterson of Sweden 7-5, 6-4 and the third-seeded Lisicki defeated Silvia Soler-Espinosa of Spain 6-4, 7-5.
Kerber next faces the Czech Republic's Klara Koukalova, who defeated Germany's Annika Beck 6-4, 7-6 (6), while Lisicki plays Hungary's Timea Babos or Spain's Lara Arruabarrena for a place in the quarterfinals.
Japanese qualifier Misaki Doi upset the fifth-seeded Anna Karolina Schmiedlova of Slovakia 6-2, 6-1.
Also, Anna-Lena Friedsam defeated fellow German Tatjana Maria 6-4, 6-4, Stefanie Voegele of Switzerland defeated Renata Voracova of the Czech Republic 6-7 (3), 6-4, 6-2 and Kiki Bertens of the Netherlands beat Kazakhstan's Yaroslava Shvedova 6-1, 6-3.