Kevin Mitchell has withdrawn from his upcoming European title shot with Edis Tatli and retired with immediate effect.
"The Hammer" retires with an outstanding 39-4 record which includes 29 knockouts and two world title challenges.
The 31-year-old said: "I've had a good think about it over the last week and I'm happily retired now. I was in the gym on Friday and I wasn't myself. I wasn't enjoying my bag work or my gym work."
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"I've been doing this 22 years and it's time to call it a day and start a new chapter in my life. As a young man, I lived a bit of a party lifestyle. Partying and training don't work together. The last two or three years, I worked on my career but if I could go back, that's something I would have done differently.
"I like to think I was an exciting fighter that gave the fans value for money. I don't think they make fighters like me anymore; fighters that put it all on the line every time they fight."
Mitchell turned professional in 2003 after winning the ABA featherweight title and stormed to a first round stoppage of Stevie Quinn, cementing his place amongst the professional ranks. This started a streak of 31 consecutive victories, which was eventually halted when he lost out to resilient Australian Michael Katsidis for the WBO interim lightweight title.
After a couple of successful comeback fights, Mitchell got himself into a position to challenge for the actual WBO lightweight title against Scotland's own Ricky Burns.
The hotly anticipated domestic showdown was stopped in the 4th round leaving Burns with another successful defence of his title and Mitchell's career had hit a crossroads.
Despite initially going down the IBF route, Mitchell found himself fighting for the WBC Lightweight title against Jorge Linares but again fell short, succumbing to 10th round knockout.
A comeback fight in December 2015 against Venezuelan Ismael Barroso left the Dagenham-based fighter with the fourth loss of his career and although offered a shot at European title in March, Mitchell has decided to pursue a career on the other side of the ropes, with desires of becoming a trainer.
A great British champion and held in high regard in the boxing community, we are sure to watch over Mitchell's career as a trainer with as much excitement as we did during his time inside the ring.