Mandurah City have been completely outplayed by fourth place Joondalup United 3-1.
Joondalup piled on three unanswered goals as the City defence struggled under the sheer pressure of attack.
It took to injury time before John Baird jumped onto the scoresheet finding a way to defeat the keeper and sneak a shot into the back of the net.
City are seventh on the State League Division One table, two-points behind Subiaco AFC and Fremantle City.
Mandurah will host Fremantle City next weekend.