By Glen Andrews and Gary Smith, World-Track

LONDON — World record holder Usain Bolt was on fire again in London after waving bye-bye to his rivals to win the men’s 100-metres at the Aviva London Grand Prix at Crystal Palace.

Bolt clocked an easy 9.91 seconds in a -1.7m/s headwind, while breaking down at the 60m mark to defeat a very strong field that included Asafa Powell, who faded to sixth.

A slow start did not bother Bolt, as once again he was spectacular over the straightaway dash. The Jamaican forged ahead of the field midway through the race and then eased down, looked around, and still finished some three-metres ahead of everyone else.

"I am ready for anything that comes my way. I am not invincible, I am not unbeatable," Bolt told the BBC.

"Other people will have a good day when I don’t, but until then I’ll keep winning.Overall the main aim for me was the first 50m and I did well, I got it right so I’m happy.

"I knew it was going to be a headwind so I wasn’t worried about the time. I got a good start, the transition was good so I’m happy with myself.

"I’m still at 85% (fitness) and after this it’s all training, I’ve got two or three weeks of good training to put in so I guess I will be 100% by Berlin."

Bolt also said he is aware of the positive tests of five Jamaicans, but his not worried.

"My friend called me and told me some tests were positive but I’m not worried," he said.

Fellow countryman and training partner Yohan Blake was second in 10.11, with Antiguan Daniel Bailey taking third in 13.

Powell, who looked like he was in contention halfway in the race faded to sixth in 10.26.

Cuban Dayron Robles defeated a solid field to win the men’s 110m hurdles and continued his unbeaten run since returning from injuries.

But the Olympic champion and world record holder got strong competition from Barbadian Ryan Brathwaite before winning in 13.29 seconds running into a -2.2m/s headwind.

The Barbadian was second in 13.31 with Great Britain’s Andrew Turner finishing third in 13.66.

Also in the sprints, Bahamian world-leader Debbie Ferguson-McKenzie recorded another win in the women’s 200m, after she stopped the clock at 23.11.

The 33-year-old came off the corner slightly behind, but switched on the turbo in the closing metres to win by some two-metres ahead of American Marshevet Hooker (23.30) and Britain’s Emily Freeman (23.34).

The evening also saw a well contested women’s 4?100m relay going to a good looking American ‘A’ team, anchored home by Hooker in 42.39. The Bahamas, anchored by Ferguson-McKenzie finished second with 43.35.

Meanwhile, Russian world number one ranked pole vaulter Yelena Isinbayeva suffered a rare a defeat after losing on count backs to Anna Rogowska.

Both vaulters had successfully cleared 4.68m, but the Russian took more attempts to accomplish the feat.

Despite the defeat, however, Isinbayeva still remains upbeat about her chancing of winning the gold medal in Berlin next month.

Also in the field events, American Christian Cantwell came up big time in the final round to win the men’s shot put with a seasonal best effort of 21.85m.

His heave placed him in front of fellow countryman Reese Hoffa, who was leading up to that point with his 21.55m effort and Poland’s Olympic champion Tomasz Majewski (21.43m). Another man over the 20metres mark was American Adam Nelson with 21.07m.

World champion Blanka Vlasic cleared 2.02m to take the women’s high jump easily, while American Brandon Roulhac landed at 17.33m to win the men’s triple jump.

Elsewhere, Canadian Gary Reed won the men’s 800m with a time of 1:45.85 and Britain’s Mohammed Farah, although missing his nation’s national record by some nine-seconds or so, won the men’s 5000m in 13:09.14.

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