Kenya's David Rudisha tonight lit up the Olympic Stadium with a sensational victory in the 800m, breaking his own world record in the process.

David Rudisha of Kenya celebrates next to the clock after winning gold and setting a new world record in the men's 800m final on Day 13 of the London 2012 Olympic Games at Olympic Stadium.

Rudisha made the most of ideal conditions, storming through the first lap in 49.28 seconds and powering to the gold medal in 1:40.91.

That took exactly one tenth of a second off his previous record as all eight finalists set a season's best, personal best or national record.

Teenager Nijel Amos of Botswana claimed silver in a national record of 1:41.73 ahead of Kenya's Timothy Kitum, who claimed bronze.