BOLTON's boxing superstar Amir Khan crushed Belorussian Vitali Martynov in just 75 seconds for his fifth professional win in Nottingham on Saturday.

And he's not stopping there after his first fight over a scheduled six rounds.

For he already has his sixth fight lined up - against an as yet unnamed opponent at London's ExCel Centre later in February.

Khan insisted even one-sided fights like Martynov provide a valuable learning experience in his bid to reach the top.

And despite pushing his opponent across the ring and dumping him on the canvas from a lightning combination he insisted he had not gone in search of a knockout.

Khan added: "I don't think I threw one hard punch in there, I was just boxing and picking my shots and using my speed.

"I caught him with a good shot and kept the pressure on slowly. I didn't rush because I knew it was a six-round fight. I paced myself a lot more."

Martynov had come to the ring boasting a solid record of 10 wins from his 11 professional fights but was dominated by Khan, who will take another step up in class next month.

And his trainer Oliver Harrison believes his charge is ready for big things after watching the way he has dealt with his five opponents to date.

Harrison said: "Amir is as good as it gets right now and I would happily put him in against any opponent now and believe he would win.

"I have worked with boxers for a long time and I have never seen anything like it. He listens to everything I say and then he just goes out and does it.

"I can't ask for any more from him. I spend one hour a day working with him and when you are doing that you just can't go wrong."