Bolt sets 200m season's best as Gatlin and Blake fail to qualify for the final

Usain Bolt won the 200m semi-final 2 in a new season's best, meanwhile Justin Gatlin and Yohan Blake failed to qualify for the 200m final.

The 7-time Olympic champion Usain Bolt cruised to a confident victory in the semi-final 2 clocking his season's best time of 19.78 seconds. In the same heat Olympic 100m bronze medalist Andre de Grasse finished just 0.02 seconds behind Jamaican to break Canadian record. 

Justin Gatlin finished third in heat 3 with a time of 20.13 seconds and failed to to qualify for the final. In the same heat  the 2012 Olympic games silver medalist Yohan Blake of Jamaica also failed to make the 200m final as he finished in 6th place. Heat 3 was won Panama's Alonso Edwards, who clocked 20.07 seconds with Churandy Martina of Netherlands in seconds in 20.10 seconds. 

Meanwhile heat 1 took USA's LaShawn Merritt,  the world leader in the event, with a time 19.78 seconds as France's Christophe Lemaitre was second in his season's best of 20.01 seconds.