- Maria Sharapova eased into the semi-finals of Stuttgart's WTA tournament after seeing off qualifier Anett Kontaveit on Friday for her third-straight win on her comeback after a 15-month doping ban. The 30-year-old five-time Grand Slam winner has yet to drop a set in Stuttgart and powered past Estonia's Kontaveit, ranked 73rd, for a 6-3, 6-4 quarter-final win in one hour, 23 minutes. This was another impressive display from the Russian, who hit four aces, 28 winners and just two double faults, while she converted five of her six break points. "I served quite well and held my serve which gave me confidence, so I'm happy," said Sharapova. The former world number one will now play either France's Kristina Mladenovic or Spain's Carla Suarez Navarro in Saturday's semi-final.