Nestory Irankunda and Connor Metcalfe score as Australia spoil Turkey return to World Cup for first time in 24 years with 2-0 victory on Saturday night.
Result put Australia level with co-hosts United States at top of Group D before teams meet head to head in Seattle on Friday.
Goalkeeper Patrick Beach make eight saves for Socceroos in group opener as FIFA president Gianni Infantino look on.
Australia play for sixth straight World Cup and seventh overall.
Turkey reach semifinals of 2002 World Cup but then miss five straight tournaments before qualify this year by beating Kosovo in playoff.
Irankunda break through for Socceroos in 27th minute with low shot while pursued by three defenders. It come less than minute after first-half hydration break.
Irankunda celebrate by punch corner flag in tribute to Australian soccer legend Tim Cahill. The 20-year-old who play for Watford be Socceroos youngest-ever goal scorer at World Cup.
Minutes later Beach stop Abdulkerim Bardakcı blast from distance.
Beach start in goal for Socceroos rather than experienced counterpart Matthew Ryan in surprise decision from coach Tony Popovic.
Kenan Yildiz, 21-year-old who play for Juventus, no dey starting lineup but sub in for Turkey at halftime.
Turkey get dangerous free kick in 57th minute but Arda Güler attempt save by Beach. Güler, talented 21-year-old attacking midfielder who play for Real Madrid, no dey born yet last time Turkey play World Cup.
Connor Metcalfe capitalize on Ismail Yüksek turnover in 75th minute to double Socceroos lead.
Socceroos fall to France in opener in Qatar but then beat Tunisia and Denmark in group before get knock out by eventual champions Argentina in round of 16.
Be third World Cup appearance for Turks who reach tournament for first time in 1954.
Turkey go next face Paraguay who down 4-1 in group opener on Friday in Los Angeles.
Associated Press contribute to report.
