Sheffield United travel to Manchester United tonight and Chris Wilder has a number of big selection calls to make. The Blades boss saw his team hammered at the weekend by Burnley despite some positive bits of play in the opening half an hour. Wilder himself has admitted he liked some of what he saw from his players but also admitted that the attitude of some in how they effectively went under, was not acceptable. That’s left Wilder with some big selection questions for tonight’s trip to Old Trafford. Sheffield United selection issues at Manchester United The main topic for Wilder to address is…