Sir Chris Hoy's bid to reclaim his men's sprint world title was ended by defending champion Gregory Bauge at the Track Cycling World Championships in Copenhagen.
The Olympic champion was pitted against France's Bauge in the quarter-finals after being caught napping by Germany's Robert Forstemann in the second round, requiring a repechage to reach the last eight.
But in a titanic tussle with his successor as world champion, Hoy won the first contest before Bauge won two in a row - the second by a whisker - to progress to Sunday's semi-finals and end the Scot's participation in the event.
Olympic champion Victoria Pendleton earlier went through to this afternoon's final of the women's sprint competition with a 2-0 victory over Beijing silver medallist Anna Meares.
She will meet Guo Shuang of China in the final.