Rio de Janeiro, Brazil: Jamaican sprint star Usain Bolt safely negotiated the first round of the Olympic men's 100m on Saturday in the first step on his quest for an unprecedented ‘treble treble’.

Bolt, seeking a third consecutive Olympic title in the blue riband event, clocked 10.07 seconds at the Olympic Stadium.

The 30-year-old world record holder, greeted with acclaim by the large vociferous crowd, will also bid to defend his 200m and 4x100m relay golds for the third time later in the week.