Coco Gauff's phenomenal breakout year continued as she defeated Andrea Petkovic in Linz to reach her first-ever WTA tour-level final. It was a slow start for the 15-year-old, who lost the opening two games of the match, but never looked back as she claimed the first set 6-4. The second-set was a more straightforward affair, though after breaking for a 3-2 lead, Gauff was twice forced to dig deep to save break-back points from Petkovic. She missed one match point as the German hung in there, but converted her second to become the youngest finalist at a WTA event since Nicole Vaidisova, the 2004 Tashkent winner. "It's crazy," he said after the match. Gauff is also in the doubles draw alongside her familiar partner Caty McNally.