Swimming at the 2009 World Aquatics Championships – Men's 100 metre butterfly : ウィキペディア英語版
Swimming at the 2009 World Aquatics Championships – Men's 100 metre butterfly
(詳細はForo Italico. Both the heats and semifinals were held on 31 July with the heats being held in the morning session and the semifinals being held in the evening session. The final was held on 1 August. ==Records== Prior to this competition, the existing world and competition records were as follows. The following records were established during the competition: