Carlos Carvalhal has predicted a far from easy task for both the Owls and Birmingham in the Championship clash on Saturday.
Wednesday travel to the Midlands seeking a third straight win, while the Blues are out to cement an existing place in the top place.
Carvalhal told swfc.co.uk: “I expect a difficult game for both teams. Birmingham are a very good, compact team and they are in fifth position at this moment.
“Us, we have won two games in four days, which can make the table change very quickly at this stage of the competition.
“I expect a very good game, the television cameras are there, we will have another very good backing - and as always we will play to win.”