Fulham should not be a problem for Manchester United and I don't think that guy is getting sacked even if he lose that match. The worst case have not happened yet and I believe he is not going to stay back and watch Manchester United reach that level unless he doesn't want to remain in Manchester United.
Yeah that's true because Fulham has a very low performance since last season till now, and they have played 9 matches and won only 4, lose three matches and draw two matches, although considering this record they are good but not good enough to beat Manchester United because irrespective of how Manchester United has been on a serious poor performance this season but I don't think Fulham stance on any chance of winning them. However even if they are playing from home, there advantage will not be enough to win the Manchester United.