Anthony Joshua was crowned the new IBF world heavyweight champion after stunning Charles Martin in the second round on Saturday.

The Brit claimed the world title at the The O2 Arena in London - the same venue where he made his professional debut - in his 16th fight.

Joshua was on the front foot from the beginning and had Martin rattled in just the first round. 

The 26-year-old then caught Martin with a counter right hand, sending him crashing to the canvas, before landing another big right for a knockout win. 

Joshua, who won gold for England at the 2012 Olympics, says he still has plenty left to achieve.

"It's only a quarter of the way there. I'm not going to get carried away because there are still things to be done. I'm going to go back to the changing room and do some pads," he said.

"There'll probably be some negativity about Charles Martin but a few days ago he was this big dangerous southpaw. 

"He was willing and brave enough to come to the lion's den and that says a lot about Charles Martin. Big respect."