Olympic silver medallist Paul O'Donovan has won his quarter-final in the lightweight single sculls at the World Rowing Championships in Rotterdam.

O’Donovan, who won silver at Rio 2016 alongside his brother Gary in the lightweight double sculls, reeled in Luka Radonic at the halfway point on the 2,000-metre course before repelling the challenge of US rower Colin Ethridge.

The Skibbereen rower clocked six minutes 54.79 seconds as he swept into Thursday afternoon's semi-final.

Ethridge, who finished 2.27 seconds behind O'Donovan, advanced in second, with Radonic also qualifying back in third.

O'Donovan is unbeaten in at the regatta after easily accounting for his rivals in Monday's heats and will be confident of claiming a place in the final after recording the fastest time of the 12 semi-finalists.

At junior level, double sculls pair Ronan Byrne and Daire Lynch reached the quarter-finals after finishing second in their heat.