British heavyweight Derek Chisora and his former world heavyweight and cruiserweight champion manager David Haye have announced they have amicably parted ways.
One of the highlights of both men's professional careers was their infamous 2012 grudge bout against one another at London's Boleyn Ground, the former home of the Premier League's West Ham United.
After Chisora was beaten via decision by heavyweight titleholder Vitali Klitschko in Germany, Haye gate-crashed the post-fight press conference and ended up in a frightening weapons-laced brawl with his compatriot.
Haye won their encounter months later via fifth-round TKO, and retired four fights later following a pair of defeats to Tony Bellew. Chisora then took his former rival on as a business manager and Haye's positive influence behind the scenes and at the gym led to a rejuvenated 'Del Boy'.
Nonetheless, Chisora lost his last two fights to Oleksandr Usyk and Joseph Parker and the duo have decided to end their association after nearly three years.
"It's been an action-packed couple of years, getting Derek back in the mix of the heavyweight division, taking him from 'Del Boy' to 'WAR' mode," Haye told Sky Sports.
"When we announced our unlikely partnership we pledged to give fight fans the big nights of heavyweight clashes they have called out for and that I believe we have achieved.
"Whilst I will no longer be managing Derek, I will naturally continue to follow and support his career with great interest.
"The UK remains at the epicentre of the heavyweight division and Derek stands ready to go toe to toe with them all. 2021 is looking very exciting for him with a number of options available."
Chisora added: "Everyone close to me thought I was crazy when I told them I wanted David to manage me, but in the last two and a half years my performances in the ring have spoken for themselves.
"Giving fight fans the battles they wanted to see even when COVID put a handbrake on everything. I may have been robbed against both Usyk and Parker but have developed as a fighter. 2021 is looking very interesting, I am back in camp, ready to go this autumn. It's time for WAR.
"I would like to thank David for his support (at times patience...) and guidance during our time working together."