Romanian tennis star Simona Halep has a great level of admiration for her new coach Patrick Mouratoglou as she reveals she was always impressed by Mouratoglou’s ability to keep Serena Williams motivated even after so many big wins. Halep worked with coach Darren Cahill for a very long time, before the two split last season. Cahill was the coach that guided Halep to two Grand Slams and a world No. 1 ranking. Even though Halep and Cahill are no longer working together, Halep has a great level of respect for Cahill and speaks highly about him whever she gets asked abou …