New Delhi, June 19 -- While Canada made World Cup history against Qatar, its celebration was tempered by concern for an injured teammate.

Jonathan David scored three goals and Canada won its first World Cup match while all but securing a spot in the knockout round with a 6-0 victory over Qatar on Thursday.

Qatar was reduced to nine players because of red cards in the chaotic match. Assim Madibo was handed a red early in the second half after a tackle on Ismael Kone, who was stretchered off with a broken left leg. Homan Ahmed was sent off in the first half for a challenge on Tajon Buchanan.

With the outburst of scoring, Canada tripled its overall World Cup goal total. Cyle Larin scored in the Canadians' opening draw against Bosnia-Herze...