Christine Sinclair scored twice in the second half on Saturday to help give Canada a 3-0 win over South Africa in the women's Olympic football tournament.
Sinclair netted in the 58th and 86th minutes at the City of Coventry Stadium after Melissa Tancredi had opened the scoring in the seventh.
The result boosted Canada's hopes of advancing as it sits third in Group F with three points, one point behind both Japan and Sweden. The two best third-place teams advance to the quarterfinals along with the top two teams in each group.
South Africa has zero points after losing its first two games and faces world champion Japan in its last game. Canada plays Sweden.
Canada took the lead when Tancredi slotted the ball past South Africa keeper Thokozile Mdaweni for her second goal of the tournament.
Tancredi could have netted another in the 12th but headed wide of the goal from close range.
South Africa's best chance of the first half came in the 22nd when Andisiewe Mgcoyi's close-range shot forced a save from Karina LeBlanc in the Canadian goal.
Canada kept pressuring in the second half and Mdaweni made a good save in the 55th to prevent Sinclair from scoring. She couldn't be denied for long, though, and the Canada captain doubled her team's lead three minutes later with a powerful header.
Diana Matheson was unlucky not to increase their advantage when her long-range effort thundered against the cross bar, before Sinclair sealed the win with four minutes left.
Canada, which will host the next Women's World Cup in 2015, is ranked seventh in the world, 54 places about South Africa.