World record holder Usain Bolt marked the fastest 100m of the season on Friday, clocking 9.76 seconds at the Diamond League.

Usain Bolt (C) of Jamaica sprints during the men's 100m race competition at the Diamond League athletics meeting in Brussels, capital of Belgium, Sept. 16, 2011. Bolt claimed the title of the event with 9.76 seconds. [Xinhua]

Bolt, 25, bettered the previous season best time of 9.78 seconds set by compatriot Asafa Powell in Lausanne on June 30.

Olympic champion Bolt saw compatriot Yohan Blake take his world 100m title in Daegu of South Korea last month after his false start, but still collected gold in the 200m and 4x100m.

He arrived in Belgium straight from Zagreb where he ran 9.85 seconds on Tuesday, his best time of the season until Friday.