Madison Chock and Evan Bates defend their ice dance title at the world figure skating championships in Montreal on Saturday. the Italian pair of Charlene Guignard and Marco Fabbri settled for third with 216.52 points. The men's competition will conclude later on Saturday when two-time reigning champion Shoma Uno takes a 1.37 point lead over compatriot Yuma Kagiyama into the free programme.