Johanna Konta has split from coach Wim Fissette after less than a year together.
The British No 1 linked up with Belgian Fissette, who had previously worked with the likes of Kim Clijsters, Simona Halep and Victoria Azarenka, ahead of the 2017 season.
Konta said in a statement: “After careful thought and discussion, Wim Fissette 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 patience, hard work and expertise.
“The goal is to get a new coach or coaches in place as soon as possible but the focus will be on making the right decision rather than a quick decision.
“I feel very excited and optimistic about the future and very committed to improving and becoming the best tennis player that I can be.”
Konta will continue to work with hitting partner Andrew Fitzpatrick, strength and conditioning specialist Gill Myburgh, physio Milly Mirkovic and mental coach Elena Sosa.
Konta has also been plagued by a foot injury, which saw her pull out of last week’s Hong Kong Open and the Kremlin Cup in Moscow this week, and she has decided not to play again this season.
She could have gone to Singapore as an alternate, while she will also miss the WTA Elite Trophy in Zhuhai.
“My foot is improving but it is still advisable to rest it further so unfortunately I will not be travelling to Singapore or to the WTA Elite Trophy in Zhuhai,” said Konta.
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