Nuremberg - Angelique Kerber has advanced to the quarter-finals of the Nuremberg Cup by beating German compatriot Anna-Lena Friedsam 6-2, 7-6 (0) on Wednesday.
Friedsam is ranked No. 112 but found her range in the second set as she held her own against the ninth-ranked Kerber, until the tiebreaker.
Fourth-seeded Elina Svitolina of Ukraine defeated Spain's Beatriz Garcia Vidagany 7-6 (5), 6-3 to reach the last eight.
Seventh-seeded Caroline Garcia outlasted Dinah Pfizenmaier 7-5, 5-7, 6-3, while Mona Barthel rallied from a break down in the second set to defeat eighth-seeded Annika Beck 6-2, 6-4.
In the quarter-finals, Kerber plays Karolina Pliskova, Barthel meets Svitolina, Garcia faces Karin Knapp and second-seeded Eugenie Bouchard goes against Yaroslava Shvedova.
Results from the WTA Nuremberg tournament on Tuesday (x denotes seeded player):
Angelique Kerber (GER x1) bt Anna-Lena Friedsam (GER) 6-2, 7-6 (7/0)
Elina Svitolina (UKR x4) bt Beatriz Garcia Vidagany (ESP) 7-6 (7/5), 6-3
Caroline Garcia (FRA x7) bt Dinah Pfizenmaier (GER) 7-5, 5-7, 6-3
Mona Barthel (GER) bt Annika Beck (GER x8) 6-2, 6-4