Canada's Jeff Stoughton lost his final game of the preliminary round 7-6 to Norway's Thomas Ulsrud at the Ford World Curling Championship on Thursday night in Regina.
The loss didn't affect Stoughton's first-place finish in the standings. Canada (10-1) meets Scotland's Tom Brewster (9-2) in Friday's playoff game between the top two seeds with the winner advancing to Sunday's championship game.
But when Stoughton was heavy on his final draw for the win, he missed the chance to eliminate Ulsrud from playoff contention. The world and Olympic silver medallist last year will play Thomas Dufour of France in a tiebreaker game Friday afternoon.
Sweden's Niklas Edin, France and Norway all finished tied at 7-4. Edin won an earlier draw-the-button competition to rank higher than the other two countries.
The loser of Friday's playoff between Canada and Scotland drops to Saturday's semifinal to face the winner of the earlier playoff between Sweden and the fourth seed to be determined by the tiebreaker.