VANCOUVER, June 13 : Australia coach Tony Popovic's gamble on youth paid off in his side's surprise 2-0 win over Turkey in their World Cup opener on Saturday, as Nestory Irankunda opened the scoring and goalkeeper Patrick Beach kept a superb clean sheet. The Socceroos boss surprised many by playing Beach in place of regular captain Mat Ryan, also leaving veteran midfielder Jackson Irvine on the bench. Popovic's faith in Beach was rewarded with an assured display from the Melbourne City keeper,