The former Jomo Cosmos man is the likely candidate to take the place of Hlanti, unavailable for the tie due to the red card he picked up against Highlands Park.
"Hlanti is a very good player, but I want to make sure people don't even notice his absence. I'm very much prepared to fill his gap," Zulu tells Kickoff.com.
The Wits starting line-up is notoriously difficult to crack with Gavin Hunt often refusing to change a winning formula so Zulu knows he needs to grab his opportunity.
Towards the beginning of the season top keeper Moeneeb Joseph got a red card and Darren Keet usurped his role as the club's number one when he stepped up in the absence of the veteran stopper.
"If you are given a chance you must grab it and use it to the fullest. My aim is to never return to the bench again. I'm more than prepared to give Supersport United a fight [tomorrow]."