Danny Williams claims a "miracle supplement" will enable him to end his career in triumph before embarking on a new life as a celebrity bodyguard. Williams, the British heavyweight title holder, has confirmed his showdown with Commonwealth champion Sam Sexton at Upton Park on May 15 will be his final fight.

Danny Williams claims a "miracle supplement" will enable him to end his career in triumph before embarking on a new life as a celebrity bodyguard.

Williams, the British heavyweight title holder, has confirmed his showdown with Commonwealth champion Sam Sexton at Upton Park on May 15 will be his final fight.

The 36-year-old has won 41 of his 50 contests, including a spectacular fourth-round knockout of Mike Tyson in 2004, but will retire whatever the result against Sexton.

In December he admitted to be being a "shot fighter" but has since rediscovered his appetite for the sport in time to complete a victorious farewell.

"Regardless of what happens against Sexton I'm retiring. This is my last fight and that makes me more hungry and dangerous," he said.

"I've got nothing to lose. I'm now taking some supplements - secret and miracle supplements - and they've made me a new man, trust me. I've got my mojo back now. Sam should have fought me in February because he'd have had more chance then. Now I'm going to give it to him. I came into boxing as a winner and I don't want to go out as a loser.

"I'll put everything into this fight. But then that's it - I couldn't be tempted back. Twenty-eight years in the sport is enough."

Williams already has his plans after boxing mapped out, though he admits he will reflect on his career with some regret.

"I'm going to be a bodyguard for showbiz personalities," he said. "After this fight I'm going to do a two-week course to shoot guns and stuff like that. I'm not satisfied with what I've achieved - I'd have liked to have won the world title.

"The highlights of my career were Mike Tyson and beating Mark Potter (Williams fought on after dislocating his right arm early in the fight).

"My ambition was always to be a fighter of courage, like one of my heroes Rocky Marciano."

Williams was scheduled to meet Sexton in February but the Commonwealth champion was forced to withdraw after cutting his thumb during a cooking accident at home.

The Brixton Bomber then pulled out of a British title defence against late replacement Derek Chisora on the same bill citing a heavy cold, though some reports offered an alternative explanation.

"It was a load of rubbish when people said my head wasn't right," said Williams. "I was offered a fight with Audley Harrison on April 9 for the European title.

"I was debating whether I should go for that or whether I should fight Sexton. I went for this fight because I only had three weeks notice to fight Audley.

"That wasn't enough time to prepare. The last time I boxed Audley I only had five days notice and I lost, but people only remember that I lost and not that I had five days notice."

Sexton, 25, seized and defended the Commonwealth title with two early wins against tough Northern Irishman Martin Rogan in Belfast.

"Danny says he's got his mojo back, but it will have to be some mojo to beat me," said Sexton, who has just one defeat in 14 fights.