To be honest, losing at Swansea, or even drawing isn't even that bad as Swansea have proved to be a quality team who are difficult to beat at the Liberty. For example drawing with Swansea and beating United is favourable. It just puts pressure on beating United you'd say.
United still need to show a similar guile over a run of games. Lest we forget, this was the team that in the week lost to Arsenal at home. It's going to be close regardless of tomorrows result.
If Liverpool win tomorrow they will get top 4 though I believe.