The Owls, who entertain Wycombe on Saturday, will book a return to the Championship and condemn the Blades to a play-off place if they match United's result at Exeter.
But the former Charlton man would want the Blades to prosper if they did finish third.
"I hope everything goes well for us and I hope we get there," he said. "But I hope United get there too because this city cannot live without the derby.
"This season was unbelievable, it was the best two games of my life and I have played in Milan. To see the atmosphere, the city needs it."