What happened: Bosnia and Herzegovina striker Jovo Lukić scored in the 21st minute to give his side a surprise early lead against co-hosts Canada in Toronto. Lukić, who returned to the national team in May after nearly five years away, headed home a corner to silence the home crowd in Canada's first-ever home World Cup match.

Why it matters: The goal vindicates manager Sergej Barbarez's bold decision to start the 27-year-old forward over legendary captain Edin Džeko. For Canada, the early deficit puts immediate pressure on their 'golden generation' to respond in a Group B that includes heavyweights and requires a strong start on home soil.

What to watch: Canada looks to stars like Jonathan David to find an equalizer before halftime to regain momentum in front of the Toronto crowd.