Zola is still struggling with a long-standing hamstring and hip problem that has seen him sit out the last five matches and the Congolese striker will be assessed before Albion travel to west Yorkshire.
Manager Gary Rowett's squad will otherwise be unchanged as his players look to maintain their challenge for automatic promotion.
Substitute Matt Paterson kept them in the hunt last weekend with a goal deep into injury time to sink Plymouth 1-0 at the Pirelli Stadium and the striker will have done his claims for a recall no harm with that.
Jimmy Phillips, Jack Dyer and Adam Drury are options should Rowett feel the need to change anything in midfield.
Captain Zander Diamond and goalkeeper Stuart Tomlinson were dropped following the 7-1 hammering at Port Vale on April 5.
Centre-half Marcus Holness and Dean Lyness replaced them in the starting line up and are in strong positions to retain their places after back-to-back clean sheets in victories over Wycombe and Plymouth.
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