Johanna Konta has split from her coach Wim Fissette after 10 months working together.
The world No 10, has amicably split from her coach Wim Fissette but will carry on working with the rest of her team.
Konta's withdrawal from the Kremlin Cup this week after a foot injury effectively ends her season as she will not qualify for the WTA finals in Singapore.
She said: "After careful thought and discussion, Wim and I have mutually decided to end our working relationship.
"Things ended very amicably and I wish Wim all the best. We've achieved a lot together and I want to thank him for all his hard work, patience and expertise."
This season has been her most successful, after winning the Miami Open in April and reaching the semi-finals of Wimbledon before being beaten by Venus Williams.
Konta's initial rise through the WTA rankings began under coach Esteban Carril, yet she split from the Spaniard at the end of her spectacular 2016 season which saw her break into the top 10.
The British No 1's performance and ranking continued to improve when she partnered up with Fissette and peaked at No 4 in the world rankings.
However the 26-year-old has been plagued with injuries this season and also had to pull out of last week's Hong Kong Open.
She has only won two games since losing to Williams in the semi-finals of Wimbledon and has continued to have issues with her foot.
She said: "My foot is improving but it is still advisable to rest it further. I want to make sure that I am fully fit to start preparations for what I hope will be an exciting 2018 season."
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