New York: Jamaican sprint king Usain Bolt has work to do after clocking an unconvincing 20.29sec to win the 200m at the New York Diamond League meeting on Saturday.


Usain Bolt (right) crosses the finish line ahead of Alonso Edward. Pic:AP/PTI 

Even with a headwind of 2.8 meters per second, Bolt said he was baffled by a performance that included "the worst curve ever in my entire career," although he said it was too soon to say the alarm bells are sounding for the World Championships in August.