A 19-year-old from Christchurch has won his professional boxing debut in Thailand.

Kwahli Beauchamp, three-time amateur New Zealand boxing champion, won the match on Sunday night in unusual circumstances against a last-minute opponent.

When Beauchamp was all set to fight, the promoter made a last-minute change to the fight with a much taller, bigger boxer.

Beauchamp, along with his father, trainer, and manager, Nort Beauchamp, accepted the challenge.

The opponent had a tight guard and a high advantage, but Beauchamp utilised every gap he could find and caused significant damage to his opponent’s body.

The fight ended with a second-round knockout caused by multiple body shots before the opponent fell to the ground.

A Beauchamp family spokesperson said, “Kwahli was so excited about his win that he forgot to take off his hand wraps until the post-fight feed.”

Beauchamp’s next professional fight will be in Christchurch at the end of the year.