Kenyan-born winger Bruce Kamau scored in the 90th minute to give Adelaide a 1-0 away win over the Melbourne Victory on Friday, moving United provisionally into third place in the A-League.

Late substitute Kamau's goal on a deflection kept Adelaide unbeaten in their last 12 games. Their 33 competition points are two behind leading Brisbane and one behind second-place Western Sydney Wanderers.

The loss left the Victory level on points with fourth-place Melbourne City, but behind on goal difference.

The league leaders will have a chance to extend the gap on Adelaide when Brisbane play in Perth and Western Sydney take on Sydney FC in a sold-out derby at Sydney Football Stadium, both on Saturday.

On Sunday, Melbourne City host last-place Central Coast to close out the 20th round.