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Australia scored a stunning 2-0 upset over Turkey in their World Cup Group D opener on Saturday as coach Tony Popovic's bold selection gamble paid off.

Nestory Irankunda and Connor Metcalfe scored the goals and rookie goalkeeper Patrick Beach produced a string of crucial saves to help secure a famous Australian victory at Vancouver's BC Place Stadium.

Australia coach Popovic had pulled off a massive shock in his starting line-up, dropping experienced captain and goalkeeper Maty Ryan in favour of Beach, winning only his third cap.

Vice-captain Jackson Irvine was also dropped in favour of 21-year-old midfielder Paul Okon-Engstler in a starting XI that featured 10 World Cup debutants.