Sunday, 17 November 2019 () LONDON (AP) — The first time Dominic Thiem played at the ATP Finals, he was handed an unknown Greek teenager as a hitting partner in training. Three years later, Thiem is facing that same player in the final of the season-ending tournament. Thiem beat defending champion Alexander Zverev in the semifinals on Saturday after Stefanos Tsitsipas ousted six-time winner Roger Federer, setting up a title match between two players who first met each other at the O2 Arena under very different circumstances. ”I just saw a picture before that I practiced with him the first time I played here 2016,” Thiem said after beating Zverev 7-5, 6-3. ”He was a hitting partner here. It’s an amazing story for...