Bolt shows commanding form over 200m

(CNN) -- Usain Bolt showed he will be the man to beat in Beijing over 200 meters with another commanding performance in the London Grand Prix on Saturday.

The Jamaican cruised to victory in the longer sprint in a time of 19.76 seconds, despite pulling up in the final meters.

Wallace Spearmon of the United States was second in 20.27 and Paul Hession of Ireland was third in 20.37.

Bolt, who set a new 100 meters world record in May, still claims he is undecided whether to run in both events at next month's Games despite his brilliant form this season.

"I'm not sure yet," Bolt told Associated Press.

"I came out here with a plan and I did execute that well," Bolt added.

"My coach, no doubt, will tell me what I did wrong. I just came here to work on my 200 and I did just that today."

Bolt set the 100 world record of 9.72 seconds in May, breaking the 9.74 mark of Jamaican teammate Asafa Powell.

On Friday, Powell won the 100 in London in 9.94 seconds, and Yelena Isinbayeva of Russia narrowly missed out on yet another world pole vault record when her attempt at 5.04 meters saw the bar agonizingly tip off.

Meanwhile, France's former heptathlon and long jump world champion Eunice Barber failed in her bid to qualify for a fifth Olympics.

Barber, who has been plagued by injury, failed to reach the qualifying mark in the long jump at the the national championships.

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