Junior Witter is convinced he will regain the WBC light-welterweight title.

The British star takes on Devon Alexander in California for the vacant crown and is hoping to win back the belt he lost last year to Timothy Bradley.

"I'm going to go out there and do my thing because as long as I perform to my best then I know that the title's coming back home with me," he said.

"I know I'm good enough to beat Alexander so it's all about me fighting my fight. I'm not going to worry about what Alexander has planned.

"I've watched him fight and he's a talented guy. He's unbeaten in 18 fights with 11 KOs so the numbers are certainly impressive. He's young, ambitious and he's an aggressive, come-forward southpaw with fast hands so I rate him as a good fighter."

Alexander has youth on his side - at 22 he is 13 years younger than Witter - but the Briton says his greater experience could well pay dividends.

Witter added: "He hasn't had to face adversity yet in his career because everything's gone his way so far and he's probably expecting that to continue. The fight's in the US so everything's in his favour but Junior 'The Hitter' Witter loves a challenge and the Hitter's going to take his title back home."

Witter is adamant that he will be back to his best after a poor display saw him lose the title to Bradley.

"I had some problems outside the ring going in to that fight and it actually led me to overtrain," he explained. "I didn't rest my body enough and I wasn't easting properly but I've addressed those problems and the training camp for this has been great.

"I've had excellent sparring at the Ingles' gym in Sheffield, there are some great guys coming through in the gym at the moment and that kind of competition keeps you sharp and helps to drive you on."

However, Alexander is brimming with confidence ahead of the biggest fight of his career and is already thinking of further big nights.

"I'm not stopping my undefeated run for anyone," he said. "I'll never have a chance at the biggest fights in the world against Floyd Mayweather or Manny Pacquiao unless I win this."