The top seed Novak Djokovic broke the spirit of Jo-Wilfried Tsonga with a 6-4 3-0 victory at the Montreal Masters as the Frenchman quit after 59 minutes with a sore right arm.
Djokovic will play Mardy Fish for his ninth title in 2011 after the American knocked out another Serb, Janko Tipsarevic 6-3 6-4 in the other semi-final.
The Australian Open and Wimbledon champion Djokopvic has now won 52 of 53 matches this season and is trying to become the first player to win five ATP World Tour Masters 1000 titles in a season.
Fish is the thirdAmerican since 2000 to reach the semi-finals in Canada, joining Andy Roddick and Andre Agassi, both former champions.
