By Sean Davies Cwrt Herbert Sports Centre, Neath

Gammer tasted defeat for the first time in his five-year career

Scott Gammer says he will regain the British heavyweight title and wants a rematch with conqueror Danny Williams.

"I don't know what went wrong, I know my fitness was good but I just felt drained from the first round," he said after his KO by Williams in the ninth.

"I'll be back in the gym within a week, then I'll fight as soon as possible.

"It was my first defeat and a big one, but I'll be back stronger. I'm going to get the belt back and there's no shadow of a doubt that I want a rematch."

The 30-year-old Pembroke Dock man's prospects of an immediate return with Williams seem slim, the Londoner likely to target bigger fights if he does not follow through on a possible plan to retire.

GAMMER v WILLIAMS FEATURE Gammer's decision making failed to take account of the enigma that is Danny Williams BBC Sport's Sean Davies More on 606

But 33-year-old Williams could vacate the belt in either event, opening up the chance of another title chance for Gammer, whose record now stands at 17-1-1 (9 KOs).

Williams, stopped in three rounds by Harrison in an awful performance in December, weighed in at a lightweight 16st 4lb, the lightest he had been since his professional debut in 1995.

After the fight, he claimed a set of his own scales led him to believe he was more than 19st, but in any case it was clear that Gammer's decision to come in at a career-high 17st 1lb cost him expected advantages in speed and work-rate.

"Scott boxed a lot better than I anticipated," said Williams, whose record moves to 37-6 (30 KOs) after the win at the Cwrt Herbert Sports Centre in Neath.

Looking at Danny and the way he fluctuates in form I thought the time was right to take him Gammer's promoter Paul Boyce

"I thought that he was a come-forward fighter with no boxing skills, but he threw good combinations.

"In the eighth I could see him getting excited at the shots he was throwing, but I knew I would get him in the next round because of the effort he was putting in without hurting me.

"The local crowd was encouraging him and making him throw more, but I just covered up and showed my experience.

"He has to improve on what he does and come back - I'm sure he can win the British title again."

Gammer's promoter Paul Boyce admitted that he had miscalculated in taking the Danny Williams fight, having turned down a bigger-money match with Audley Harrison in London.

"I got it wrong and I take responsibility," said Boyce.

"Looking at Danny and the way he fluctuates in form I thought the time was right to take him.