David Haye knocked out Dereck Chisora on a night of big-time boxing in east London.

The south London-born heavyweight lifted the WBO and WBA international heavyweight titles after putting Chisora on the canvas twice in the fifth round of an enthralling contest at the Boleyn Ground.

With around 30,000 fans making for an amazing atmosphere at the home of West Ham United, Haye enjoyed the backing of the majority of the boxing fans inside the stadium.

Despite heavy rain falling, the crowd took down their umbrellas to get involved in one of the most hotly-anticipated fights ever between two British boxers.

From the first bell, both boxers traded blows in what was a toe-to-toe contest. Both fighters hit the other with challenging shots, but neither gave an inch during the opening four rounds.

While Chisora's chin held firm, it was clearly Haye who held the upper hand on points as the bout entered the fifth round. Then, with a series of lightning fast combinations, the 31-year-old had his Zimbabwe-born opponent on the floor.

Chisora recovered from his first knockdown at the count of eight, but it would not be long before he was back down and referee Luis Pabon decreed he was unable to continue.

To loud cheers, Haye put on his two belts before lauding Chisora's durability and accepting the acclaim of the crowd.

Earlier in the evening, West Ham United fan and Cork native Gary 'Spike' O'Sullivan defeated Matthew Hall for the vacant IBO international middleweight title.

All in all, with six fights on the bill, it was another night of top-quality boxing at the Boleyn Ground.