"Lazy" Bolt surprised by De Grasse

2016 Rio Olympics - Athletics - Semifinal - Men's 200m Semifinals - Olympic Stadium - Rio de Janeiro, Brazil - 17/08/2016. Usain Bolt (JAM) of Jamaica and Andre de Grasse (CAN) of Canada smile as they compete. REUTERS/Gonzalo Fuentes

RIO DE JANEIRO (Reuters) - Usain Bolt admitted to being surprised by Canadian sprinter Andre De Grasse's final burst of speed in Wednesday's Olympic 200 metres semi-final.

The Jamaican seven-times gold medallist exchanged friendly smiles with first-time Olympian De Grasse as they charged towards the line to finish the heat in 19.78 and 19.8 seconds respectively.