Both teams will have had just a five-day turnaround but the Phoenix have the advantage of playing both games at home and in at least getting something from Saturday's game.
The Heart, however, have to bounce back from the disappointment of a last-minute home loss to bitter rivals Melbourne Victory.
The two teams battled out a 1-1 draw in Melbourne in round two.
Tyler Boyd will again start tomorrow night alongside Jeremy Brockie and Louis Fenton in a lively strikeforce with Dani Sanchez slotting into the attacking midfield role.
Solomon Islander Benjamin Totori will again be on the bench but his introduction is certain to stir the Phoenix faithful after his strong showing against the Mariners.
Defensively, the Phoenix will again be well-organised, although they were badly caught out in allowing the Mariners to carve through to score five days ago.
The Phoenix need to string some convincing results together if they are to be taken as a serious contender which, at this stage, they are not.
Likely Phoenix lineup: Paston; Bertos, Sigmund, Durante, Lochhead; Lia, Muscat, Sanchez; Fenton, Brockie, Boyd.