Chris Wilder identifies the one thing he will not tolerate from his players at Millwall

Despite planning to make changes to his starting eleven, with David McGoldrick among those hoping to feature after making progress in his battle to overcome a foot complaint, Wilder insisted he is “deadly serious” about reaching the fifth round of the competition.

But even if his side win, Wilder warned he will still come down on them hard should he suspect they have taken a result for granted.

“I don’t like inconsistencies in attitude,” he said. “In fact, it’s one of my pet hates. It has to be spot on.

“If we get beat from a bit of magic or a goalkeeper doing well, we still shouldn’t be found wanting in terms of attitude. It’s really important to me that the group know that.”

Wilder changed his entire starting eleven when United set-up their trip to The Den by beating AFC Fylde. Although he plans to rotate again in order to keep his squad fresh as they battle to secure a place in next season’s Europa League, Wilder refuted suggestions that means he is taking the competition lightly.

“People are always going to have an opinion,” he said. “People recognise, especially for promoted teams like us, that you have to prioritise in the Premier League. Even (leaders) Liverpool do that.

“But this is still a competition we have a huge history in and we want to go well.

“We had to make those changes last time because we had games against Manchester City and Liverpool either side of it. Now the fixture list gives us another seven days to get ready for the next one.”

United, who are eighth in the table, return to London when they face Crystal Palace at Selhurst Park next weekend. Millwall are also eighth, albeit in the Championship, and unbeaten in their last six outings.

“I won’t be making 11 changes,” Wilder, who is expected to hand a debut to new signing Jack Robinson, said. “I wasn’t disrespecting the competition last time, I was just being realistic and doing what I thought was best for our club.”