READ: Ovono pleased with CAF showing
New signing Ovono made his first start for Bucs in a 2-0 win over AC Leopards on the weekend, a result which saw Eric Tinkler's men reach the semi-finals of the competition with a game to spare.
READ: Tinkler downplays favourites tag
Ovono is the only keeper available to compete in the event, as first-choice gloveman Brighton Mhlongo is injured, while Mpontshane is not registered to do duty in the CAF showpiece.
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"I've said it before and I will say it again, I need to protect Ovono," Tinkler told the club's website.
"He is my only CAF keeper. So Siya will play against Bloemfontein Celtic.
"The reality is that I have four keepers but only two that are fully fit."
Mpontshane was in goal when the Buccaneers thumped Chippa United 4-1 in the League earlier in the week.
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