France's Florent Manaudou took a shock gold in the 50m freestyle in his first major individual sprint final.

Swimming from lane seven, the 21-year-old beat American Cullen Jones to finish in 21.34 seconds, with Brazil's world record holder Cesar Cielo third.

France have now won four golds in the pool at London 2012, doubling their all-time Olympic gold medal tally.

Analysis Adrian Moorhouse Olympic gold medallist and BBC pundit "How did he win that? He was winning the whole way. He stayed under the water a lot longer than anyone else and comes up at 15 metres in the lead and never loses the race. That has stunned me. I think I need a lie down! France are having a good meet, they have four gold medals now. Outstanding."

Manaudou's win adds to golds for Yannick Agnel and Camille Muffat, with another in the men's 4x100m relay.

Agnel's success in the men's 200m freestyle - he also anchored France to a spectacular win in the 4x100m relay - was perhaps more expected than that of Manaudou, who is the brother of former Olympic 400m freestyle champion Laure.

There was some movement on the blocks at the beginning of the race but the starter let them go and Manaudou was quickest away.

The French youngster spent a long time under the water before surfacing in the lead and holding on to beat Jones by 0.20 seconds.