Nigerian born Anthony Oluwafemi  Joshua launched himself into British superstardom and world-title glory with two booming right hooks in the second round to send 20,000 fans into rapture here last night and leave the hapless defending champion Charles Martin flattened

I come to knock people out and give value for money,” said Joshua in the ring afterwards. “It’s about power and precision. I told you what I was going to do. I’m going to keep on grinding, keep on working hard, and I’ll fight them all.”

Anthony Joshua stopped Charles Martin in two rounds at London’s O2 Arena to claim the IBF heavyweight title in only his 16th professional fight.

The Briton floored his American opponent with a peach of a right-hand counter and after Martin was knocked down again, the referee called a halt.

The 26-year-old is his country’s sixth bona fide heavyweight world champion.

Joshua is also just the third man to win a pro heavyweight world title while still a reigning Olympic champion.

And he is the first Briton to win both the super-heavyweight Olympic gold and a version of the world heavyweight title – London-born Lennox Lewis was fighting for Canada when he won the 1988 Olympic super-heavyweight title in Seoul.

Joshua joins Muhammad Ali and Leon Spinks as the only men to be professional heavyweight world champions while still reigning Olympic champions.