“Thank you so much for your help to the team, Patrick?? It’s been great learning for me on many levels on and off court and a lot of good energy?,” Rune wrote on Instagram. “I will take all your advice with me onwards ?See you soon at the academy.”

Last October, Rune announced Mouratoglou, who has coached stars including Serena Williams, would join his team for the rest of the season. The Dane went on to triumph in Stockholm and claim his first ATP Masters 1000 title in Paris. Mouratoglou shared his own post on social media Monday.

“Holger! We’ve successfully completed our mission and ended up having an incredible 6-month adventure, exceeding our original plan of 3 months,” Mouratoglou wrote. “It was a pleasure to share this journey with you. Your energy and enthusiasm made it even more special.

“I have no doubt that your bright future holds amazing things. I remain your biggest fan and I keep an eye on you with the @mouratoglou_tennis_academy team.”