Monday 11 December 2017 11:56, UK
Marin Cilic has confirmed he has split from coach Jonas Bjorkman ahead of the 2018 season.
The Croatian, who reached a career high of world No 4 in October, had worked with the Swede since the summer of 2016.
Cilic reached the Wimbledon final, his second appearance in a Grand Slam final after winning the US Open in 2014, earlier this year but lost to Roger Federer and lost all three round-robin encounters at last month's ATP Finals in London.
"We had some great results during 16 months and established an amazing relationship," Cilic said in a social media message. "It was a great pleasure to work with him.
"Would like to thank him for all his efforts and wish him the best."
Bjorkman, who worked with Andy Murray during 2015, reached a career high of world No 4 in the singles during his playing career and helped Cilic to the Istanbul title in May.
The 29-year-old, who finished in the world's top 10 for the second successive year, has not announced a replacement ahead of the new season.
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