Watch Kieran Smith's 18-second stoppage of Robert Asagba

Kieran Smith produced one of the quickest stoppages in boxing history on Friday night.

It took the Scottish super-welterweight just 18 seconds to beat Robert Asagba, after a shot to the body, followed by a blow to the side of the head, floored his opponent and forced the referee to step in.

Asagba - who was unbeaten before the match-up - had made a long journey from Chadwell Heath in London for the fight but his bout was over before he knew it, with his legs wobbling beneath him.

"It's actually a shot I've been working on in the past three or four days, after I got that opponent," Smith told Sky Sports. "I've been in the gym, working on the upper cut and it's come off in the first 18 seconds, it's incredible.

"I was training for six hard rounds but to get such an early stoppage on a big stage like this is brilliant."

The 6ft 2in southpaw (now 7-0) has struggled with injuries in the past but Johnny Nelson says his sharpness from the start paid off at the SSE Hydro in Glasgow.

"It was a little bit of a cheeky one, just behind the ear, which messes up the balance," said the Sky Sports pundit. "It's one of those shots you can't get your balance back from.

"The fight had just started but he was sharp and he got him out of there. It could have been a tricky, tough night for him."

Watch the lightning-quick stoppage by hitting play on the video above.