Usman Khawaja will be retained at the top of the order, however, two half-centuries for Victoria in recent times - one more than he managed across four Ashes Tests - has seen Harris come back into calculations for a new role, even if it isn't opening alongside Warner.
He would likely need a lack of form of injuries to happen around him however, given the fact Marnus Labuschagne and Steve Smith are among the world's best batsmen, Travis Head was in sparkling Ashes form, and Cameron Green isn't going anywhere as the team's all-rounder.
But McDonald spoke glowingly of Harris, with selector George Bailey previously saying his time in the Test team wasn't done.
“Usman you would say is a fair chance to start in the first Test match after what he did during this summer,” McDonald said.
“But we’ve got some options, some competition for spots, and that’s always healthy.
“(Harris) is an option. We know what he can do. Can he fit into the middle order if something were to go awry there? That’s a potential as well.
“If he was to be called upon, or he were to start, through whatever reason, we feel as though you could do a job. No doubt about that.”