France and Spain both won their doubles rubbers to ease through the first qualifying round of the Davis Cup on Sunday, while Canada need to overturn a 2-0 deficit to progress.

Japan fought back from 2-1 down to beat Britain 3-2 in their Davis Cup qualifier on Saturday to advance to the second round, while the United States sealed a 4-0 victory over Taiwan.

(Reuters) -Davis Cup heavyweights Australia and the United States eased through the first qualifying round on Saturday but Britain were knocked out as Japan hit back from 2-1 down to win 3-2, while Denmark staged a dramatic comeback to overcome Serbia.