A Joel Chianese goal clinched a shock 1-0 win for Perth over Wellington,setting up a clash against the Sky Blues in Wednesday's semi-final.
Nicolai Muller was bleeding heavily,convulsing and out cold for several minutes on Friday night,but appears to have avoided serious injury.
A Kwame Yeboah goal sealed a 1-0 win for Western Sydney Wanderers over a 10-man Wellington Phoenix.
Saturday's 1-1 draw at Bankwest Stadium means the defending champions cannot be caught at the top of the ladder.
Victory over Wellington means the Sky Blues now only require one point from their remaining five games to lift the Premiers'Plate.
Sydney FC star Kosta Barbarouses is gunning to become the first player to win three A-League premierships with three different clubs as the season finally gets back under way.
Wellington have been given access to the Wanderers'training centre ahead of the Phoenix's premiership deciding clash against Sydney FC on Friday.
The A-League will release a flexible draw that could allow fans to attend the latter rounds of games if regulations are relaxed.
Wellington boss David Dome fears his team's A-League title hopes are being damaged while the side waits for clearance to enter Australia.
The Wellington Phoenix staff member who tested positive to COVID-19 has been declared fully recovered while no other member of the A-League team has contracted the virus.
Wellington Phoenix had been based at the Sydney Academy of Sport in order to play A-League games in Australia.