Watch Steffen Deibler's 51.19 swim in the 100 butterfly from German Nationals

World leading swim (51.19) from Deibler and a time that would have won Olympic gold last year (although Phelps did swim 50.86 in the semi-final). The 100 fly will be wide open this year in Barcelona with Deibler going up against the likes of Chad le Clos and Evgeny Korotyshkin. It should be a tremendous race, but the event will have Phelps' shadow looming over it until one of the men take the event back under 51 seconds.

More highlights from German Nationals can be found here.