STUTTGART, Germany (AP) Qualifier Laura Siegemund upset top-seeded Agnieszka Radwanska 6-4, 6-2 on Saturday to set up an all-German Porsche Grand Prix final with defending champion Angelique Kerber.
The 71st-ranked Siegemund caused her biggest upset yet at the indoor clay-court tournament by defeating the second-ranked Radwanska in 1 hour, 23 minutes. She had already seen off the fourth-seeded Simona Halep and sixth-seeded Roberta Vinci to reach her first semifinal.
Siegemund converted five of her 13 break opportunities to make Sunday's final in her hometown.
Kerber earlier defeated Petra Kvitova of the Czech Republic 6-4, 4-6, 6-2 to reach her second successive final.
Second-seeded Kerber saved 10 of the 13 break points she faced and converted five of her 10 opportunities to beat the fifth-seeded Czech on her first match point.