McCall believes that the 3-2 victory for Neil Lennon's side over Spartak Moscow in Russia on Tuesday night has put their 2-0 defeat in context and says his men are only looking forward.
The Steelmen gaffer said: "I am confident there will be no hangover from the Celtic game going into this one with United and nor should there be.
"If it needed proving just how good a team Celtic are on their day then they proved that beyond doubt with their fine win in Moscow over Spartak.
"We move on to the United game and are determined to bounce back with the win we need to end the first quarter on a high. If we can get the three points it would keep us second at least and mean that we had suffered just one defeat in our opening nine SPL games.
"That would also prove we have made progress from the same period last year."
The Well boss will welcome vice captain Stevie Hammell back to his left-back berth while Adam Cummings will sit it out after his red card against the Bhoys.
McCall has, meanwhile, railed against the critics who claim United are in crisis and that gaffer Peter Houston's head is now on the managerial chopping block after a run of five SPL games without victory.
The Well gaffer said: "Earlier in the season Kenny Shiels was getting it at Kilmarnock and then it was Steve Lomas at St Johnstone and now it is Peter Houston at United.
"If you look at both Killie and St Johnstone they have turned their form around and I have no doubt that United will. The bottom line is that in the SPL, leaving Celtic out of it, if all managers get the chance to play their best 11 players then there is nothing in it. United have been hit with injuries just as Killie and St Johnstone.
"But you look at some of the players United have like Jon Daly, who has been out recently and of course Johnny Russell then they have players who can hurt any side on their day."
McCall added: "We managed to record a 4-1 win in our last game before the previous international break which was against Inverness and also at Fir Park and that was a massive win for us.
"Given we've lost our last two games, a win over United would be even more significant."