Doha, Nov. 27 -- The head coach of Belgium's football team has declared high-risk tactics are responsible for a string of upsets at the Qatar FIFA World Cup.

Roberto Martinez on Saturday told Xinhua in a pre-match press conference in Doha that he believes more teams are pushing for wins in Qatar rather than settling for draws, leading to shock results.

Saudi Arabia caused one of the biggest upsets in World Cup history by beating tournament favorites Argentina 2-1 followed by Japan beating Germany.

Martinez's Belgium side escaped the first round of fixtures with a 1-0 win over Canada despite registering 12 fewer attempts at goal than their opponents.

"Teams want to win games. They're prepared to take risks, and that's why we'...