JAMAICAN superstar sprinters Usian Bolt and Yohan Blake are on another collision course after both qualified for the men's 200 metre final.
Both Bolt and Blake were in complete control of their respective semi-finals, leaving no doubt the two compatriots and close friends will once again duel for the gold medal.
Blake was the first to lay down a marker, speeding around the bend before completely switching off and setting the fastest time of 20.01.
Bolt, not to be outdone, or outshone, in the second semi, raced into the lead before the end of the corner and then turned off his engine to set a time of 20.18.
A minor threat to the Bolt-Blake domination could come from a third Jamaican, Warren Weir putting just enough energy into a qualifying time of 20.28.