Sydney FC have tightened their grip on second spot in the A-League and ended Perth's unbeaten away record with a 1-0 home win at Jubilee Oval.
Adam Le Fondre's 37th-minute goal decided the cagey contest and put the Sky Blues five points ahead of third-placed Melbourne Victory.
Sydney will clinch second with a round to spare if defending champions Victory don't win at Adelaide on Friday.
Perth coach Tony Popovic made six changes to his starting side following last week's Premiers Plate clinching win.
Perth Glory's 15-year silverware drought is over after Tony Popovic's men secured the A-League's Premiers Plate with a 1-0 win over Newcastle.
Glory, who started Sunday's match five points clear of nearest rivals Sydney FC, knew a victory over the Jets would be enough to guarantee top spot with two rounds to spare.
Ivan Franjic's 65th-minute strike gave Glory all they needed in front of 11,349 fans at HBF Park, delivering the club their first piece of silverware since winning the 2004 Championship...
Perth coach Tony Popovic hopes Socceroos forward Chris Ikonomidis won't be out for long with a dislocated shoulder, after Glory tightened their grip on the A-League Premiers Plate with a 3-0 away win over Central Coast.
Perth, who are unbeaten away, with eight wins and four draws, pulled six points clear of second-placed Sydney on Sunday, with three rounds remaining.
Joel Chianese and Dino Djulbic scored in the first half hour then Neil Kilkenny added a penalty just before the hour mark.