Amir Khan made it two professional wins out of two after overcoming Baz Carey in a one-sided contest in Cardiff.
Carey, winner of nine of his 25 fights, was forced to defend from the sound of the first bell as Khan launched into a barrage of stunning combinations.
The Olympic silver medallist cut Carey's eye with big right and then attempted to lower his opponent's guard with a flurry of body shots.
Khan, 18, was caught in the final round, but that was his only blip.
The light-welterweight, who was given a 40-36 verdict by referee Wynford Jones, paid tribute to his opponent.
"Credit to Baz, he put up a good fight. I hit him with most of the punches I have got and he still stood there," Khan told ITV1.
"He is a strong boxer and he was still coming forward to fight me.
"I paced myself tonight. In the first fight I rushed a bit but I'm getting better shots in now and I'm pleased with the performance."
"I can go all the way with a good work rate against a guy who has had 25 fights and been round the block three times - I can go four rounds with anyone."