Usuthu are enjoying a far more productive season in the Betway Premiership, in third place with 22 points from their opening nine league matches.
Stellies, conversely are in eighth place with 10 points, that includes just two victories compared to seven for AmaZulu.
But with Gavin Hunt at the helm of the Cape-based side, Zwane says his side cannot expect an easy game against the experienced tactician, even after overcoming Stellies in the league earlier this season.
“It’s a very tough cup match against Stellenbosch, a very, very tough team, a hard-running team,” he said on IOL.
“You know coach Gavin is a master of switching tactics. As we stand, we don’t know whether he’s going to come with three at the back or four. So we keep guessing, simply because of the team they’ve assembled this season – a lot of youngsters, a lot of energy.”
AmaZulu secured their quarter-final place with a 1-0 win over Kruger United as Stellenbosch overcame Durban City 2-0 in their last 16 clash.
READ: ‘We’re Still Growing’- Arthur Zwane urges AmaZulu to remain grounded after Arrows victory
Chippa, however, come into this game on the back of a 2-0 defeat to Chippa United, as Zwane’s team saw off Golden Arrows by a solitary goal.
“They lost to Chippa 2–0, and they wouldn’t want to lose a second game on the trot at home. They will come out like nobody’s business. So we have to brace ourselves for a very difficult competition game.”
“We are going there as underdogs. We like the tag of being underdogs. They are playing at home, and they remember we beat them last time.
“Mentally, this team is very strong. We can take the heat, we can play under pressure, and we are prepared to die with our boots on. We want to normalise winning at AmaZulu,” added Zwane.