United beat Johnson's Bristol City side 3-0 at Bramall Lane at the start of October and although they suffered a crushing blow in the Sheffield derby last weekend, Blackwell's side sit one place above City in 5th with a chance to gain more ground on Wolves and Birmingham if results go their way.
Thanks to their simple victory over City, Blackwell feels his side have a distinct advantage coming into tonight's game,
"Of course he's worried about us. The fact that he's talking about us shows that we're in his mind," the United manager told the Sheffield Star.