George Groves has parted company with trainer Adam Booth ahead of his world title challenge against Carl Froch.
Groves will battle Froch for his WBA and IBF super-middleweight belts on November 23, live on Sky Sports Box Office, but he will be without Booth for the first time in his professional career.
Booth has been in Groves' corner since he joined the paid ranks and has plotted notable victories over James DeGale, Paul Smith and Glen Johnson.
Groves often trained alongside stablemate David Haye and the trio appeared to share a close bond in the Hayemaker camp.
But a new trainer will oversee the 25-year-old's preparations for Froch after Booth confirmed the split to Adam Smith, Head of Sky Sports boxing.
Speaking to Sky Sports News, Smith said: "He's been with George for a number of years, they were developing so well together, they sort of had this understanding and David (Haye) was like a big brother, who has been through it all before so it's a strange one, it really is.
"We were up in Manchester at the press conference yesterday and George seemed a little bit subdued. That's what he said, that correspondence has got to go to him now.
"Adam has told me personally yes that it is true, they have split. He didn't want to go into detail why and I think we should respect that, but obviously it's an odd time as George is about to enter the fight against Carl Froch as an unbeaten professional.
"I think most of us felt that Adam Booth was the type of guy that could possibly provide a tactical plan that could give George a real chance in this fight.
"It's an odd one, but maybe George feels he needs change and a fresh trainer. He is going to have to knit with someone pretty quickly."