British number one Johanna Konta has parted company with coach Michael Joyce after less than a year together.
The 27-year-old began the year as a top 10 player, but is now 45th after struggling at the Grand Slams in 2018.
Konta is playing in Moscow next week and hopes to have a new coach in place in time for pre-season training.
American Joyce was Konta's third coach in as many years, joining her after she had worked with Esteban Carril and Wim Fissette.
Konta reached the second round at the Australian Open and Wimbledon, and went out at the first-round stage of the French Open and US Open.