Li Na has split with Danish coach Michael Mortensen, the China Daily reports. Mortensen helped coach Li to her first Grand Slam title at Roland Garros, but China’s top player went into a slump after that, falling in the second round at Wimbledon and in the first round at the U.S. Open.

The 29-year-old Li said that she split with him because she did not like his "mild and gentle" way of coaching. "We have talked about it seriously and he respected my choice," Li added. Mortensen has also been the technical coach of No. 1 Caroline Wozniacki.