Marin Cilic has stopped his coaching partnership with Jonas Bjorkman.

The pair began working together in 2015, and praised each other while announcing the split this week.

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Cilic reached a career-high No. 4 this season and got to the final of Wimbledon, along with winning the Istanbul title. Though the Croatian  won the 2014 US Open, this season saw him produce sustained play at a high level.

"We did a lot of improvements," the 29-year-old said about his season at the ATP Tour Finals. "It was extremely positive. I think I played extremely consistent especially starting from the clay-court season."

Cilic has not announced a new coach.