But having got back to winning ways at Crystal Palace on Tuesday, Iwelumo insists the Black Country outfit will not be moved off the summit easily.
"We've got 10 games left and we looked the part (against Palace) - we were solid at the back and looked good going forward," he told the club's official website. "We've addressed a few things after talking about stuff and it paid off. We've given ourselves a platform and it's important we build on that now.
"The confidence should be there for Sheffield Wednesday and hopefully we can carry on in the same way and build a nice little run. But we'll be taking it one game at a time.
"We've been top of the league for a long time and we're not going to give it up without a good fight."