Sweden's fourth Maria Prytz instructs her team mates during their curling round robin game against Russia at the World Women's Curling Championships in Sapporo

Russia's lead Ekaterina Galkina (C) instructs her team-mates Alexandra Saitova (L) and Margarita Fomina during their curling round robin game against Canada at the World Women's Curling Championship in Sapporo

Canada's skip Jennifer Jones delivers a stone during their curling round robin game against Russia at the World Women's Curling Championship in Sapporo

Denmark's third Jeanne Ellegaard (C) delivers a stone as her team-mates Charlotte Clemmensen (L) and Stephanie Risdal sweep ahead of it during their curling round robin game against Sweden at the World Women's Curling Championship in Sapporo