Galahad was cruising to victory but was knocked down in the fifth round and then knocked out in the sixth session
Kiko Martinez stunned Kid Galahad with a brutal knockout to rip away the Brit’s featherweight world title.
Martinez was a huge underdog as he looked to become a two-weight champion at the age of 35.
And he was dominated for the opening four rounds as Galahad controlled the bout.
But the Spaniard dropped the champion in the final seconds of the fifth round – and then knocked him out at with his first punch of the sixth session.
Galahad was given medical attention before being led from the ring before the result was officially announced.
Martinez was no stranger to British fight fans having been beaten by Scott Quigg, Josh Warrington and Zelfa Barrett.
Mark Robinson Matchroom Boxing)
He also lost twice to Carl Frampton and was considered a soft-touch defence for Galahad.
“It may be a surprise for everyone else but not me,” said Martinez. “For the lat three years I’ve lived like a monk; no holidays, no time off and no time with my family.
“I’ve been prepared for this and worked really hard for three years. I’m in better shape than I’ve ever been , better than when I was 20 years of age.”
Galahad, who initially missed weight for last night’s fight, won his world title three months ago when he stopped Jazza Dickens to win the belt vacated by Warrington.
He had ambitions of adding more honours next year but will instead be forced back to the drawing board.
Martinez, who was in his 55th professional fight, was crowned super-bantamweight world champion in 2013 when he stopped Jonathan Romero.
He made two successful defences before losing to Frampton in their rematch.
Galahad’s defeat was the second upset of the night after fellow world champion Terri Harper was stopped by Alycia Baumgardner.
Harper had struggled from the opening bell and was knocked out on her feet in the fourth round before referee Mark Lyson stepped in.
Earlier, Chris Billam-Smith retained his European cruiserweight title by labouring to a points win over Dylan Bregeon.