Kei Nishikori stages Nikolay Davydenko comeback

Japanese 15th seed Kei Nishikori has beaten Russia's Nikolay Davydenko in three sets to make it into round three of the men's Olympic singles at Wimbledon.

Davydenko claimed the first set 6-3, but Nishikori got himself back on terms with a 6-4 win in the second.

The turnaround was complete for the Japanese in the third with a 6-1 triumph.

Nishikori will face Spanish fourth seed David Ferrer or Slovenia's Blaz Kavcic for a quarter-final spot.