The US Open champion hired the German, best known for guiding Angelique Kerber through her professional career, at the end of last season, but it has proven to be another short-lived relationship.
Raducanu said in a statement: ‘I would like to thank Torben for his coaching, professionalism and dedication over the last six months.
‘He has a huge heart and I have enjoyed our strong chemistry during the time together.
“I feel the best direction for my development is to move to a new training model that LTA supports in the meantime.”
The news comes after Raducanus’ best week since hiring Beltz, with back-to-back victories on clay at the Porsche Tennis Grand Prix in Stuttgart and an encouraging performance in defeat to world number one Iga Swiatek.
But it follows a pattern that continues from her junior days, where Raducanu, who is up at 11 on the world rankings, often changes coaches.
After bursting into public consciousness with his run to the fourth round of Wimbledon last summer under Nigel Sears, Raducanu then turned to a familiar face from her junior season, Andrew Richardson, for the US Open.
But despite her incredible success, she decided not to continue the partnership, but instead said she wanted someone with experience from the WTA Tour.
Beltz certainly ticked that box after leading Kerber to two grand slam titles and also having success with Donna Vekic, but Raducanu is now again looking for someone to guide her through her maiden voyage on the tour.
The 19-year-old, who continues his clay-court baptism in Madrid this week, will in the short term lean on the Lawn Tennis Association.
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