Becker returned to the tennis circuit last October to coach Rune, who went on to compete in the eight-player ATP Finals in Turin where his debut in the season-ending championship ended in the group stage.

"We started this partnership with the initial goal to reach the ATP Finals (at the) end of last year but moving forward I realised that in order for this to be successful, I would need to be available for Holger much more than I can," Becker wrote in a social media post on Tuesday.

"Due to professional and private responsibilities, I can't give Holger what he needs now. I wish him only the very best and I’m always going to be his number one fan. I truly appreciated this journey together."

Becker was released from a British prison in December 2022 after having served eight months of a two and a half year sentence for hiding financial assets after he was declared bankrupt.

The three-time Wimbledon champion, who previously coached Novak Djokovic from 2013 to 2016, is currently barred from entering the UK.