Manchester United are in the 7th position thanks to Brighton defeat but next game vs Chelsea isn't reassuring and they can drop in ranking if they lose it.
I also see that their performance this year is very worrying, of course if Chelsea is consistent in the match they will steal points at their opponent's base, this will again create a bad image for Manchester United. If they want to appear in other leagues next year, of course they have to maintain their current position until the end of this league, otherwise their hopes of appearing in other leagues will be dashed.
Chelsea players are showing some seriousness in some matches but they are not consistent in their winning which is the major challenge many people are experiencing from Chelsea in this season. If you look at the premier league table you will discovered that Manchester united is still ahead of Chelsea despite Chelsea won their last match with 3-2 to defeated their opponent, and nobody know if they will be able to win their next match to make people believe that they are good to increase their performance. If you look at Manchester united players very well, you will know that the challenges they are facing right now is the goalkeeper because since they brought this new keeper Onana, Manchester united started to experience some poor performance.
I think Chelsea would manage to get at least a draw at Old Trafford else even a win based on my analysis on the team performances against top clubs this season, they drew Liverpool, Arsenal, Man City respectively and defeated Tottenham though I absolutely agreed that Chelsea remain inconsistent especially when they play average premier league clubs yet they always put up brilliantly performance against top clubs, Man Utd had become shadow of former self, not formidable like before, their players had dropped form and Onana their goalkeeper is prone to mistakes all these would count against the team when they play Chelsea.