The 21-year-old, who in May set a new 100m world record with a time of 9.72 secs, finished well ahead of American Wallace Spearmon and Paul Hession of Ireland in London.

Bolt has still to confirm whether he will run in both sprint events at the Beijing Olympics, which start in three weeks' time and indicated yet again after Saturday's race he would leave the decision to his coach, Glen Mills.

No-one has won both the men's 100m and 200m at the same Olympic Games since Carl Lewis of the United States did the double in Los Angeles back in 1984.