Olympic champion Sir Chris Hoy advanced to the men's sprint quarter-finals at the second attempt on day three of the Track Cycling World Championships in Melbourne.
Hoy was beaten by France's Mickael Bourgain in the second round and fell into the repechage, where he beat Scott Sunderland of Australia and Edward Dawkins of New Zealand. Both exited the competition.
Britain's Jason Kenny, Olympic silver medal winner behind Hoy and defending world champion, had earlier beaten Dawkins to advance to the best-of-three last-eight bouts at the first attempt.
The strength of the 53-rider field was demonstrated in qualifying as 10 riders clocked under 10 seconds in the flying 200 metres - three from France, two Britons, two Australians, two Germans and one New Zealander. Under Olympic regulations, only five of those riders will be present in London.
France's Gregory Bauge, the 2009 and 2010 winner who was stripped of the 2011 title for an anti-doping offence, led the way in 9.854 seconds, with Hoy (9.902secs) fourth and Kenny (9.953), the defending champion, sixth in advancing to the 24-man first knockout round. Philip Hindes (10.498) was knocked out after placing 46th.
Matt Crampton, who was 23rd in qualifying, was eliminated by second fastest qualifier Robert Forstemann of Germany in the first round, but Hoy and Kenny progressed - just.
Kenny beat New Zealand's Sam Webster by a narrow margin and Hoy had to chase Ethan Mitchell, another Kiwi, for more than two laps before narrowly advancing in an effort which could have a lingering impact.
Hoy, perhaps feeling the effects, then was unable to overhaul Bourgain before joining Kenny in the last eight at the second time of asking.
Ed Clancy finished third in the four-kilometre individual pursuit, the fourth event of the men's omnium, to retain his overnight position of third. Glenn O'Shea of Australia remained first with two events to go.
In the opening event of the corresponding women's competition, Laura Trott finished second in the flying lap, clocking 14.391secs.