Manchester United have a head to head that has dominated the victory over Southampton, so no one doubts that Manchester United will win to Southampton in the match, but there is no harm in talking about the potential surprises that might be present in this match, especially indeed Manchester United is in bad form and Ten Hag is currently under pressure to be fired from Manchester United, in terms of player quality of course Manchester United is much better than Southampton and it is true that Southampton is currently weaker than Fulham, but we can't judging a match only based on head to head so far, we must to learn from last season where Manchester United also lost several times to quite weak teams, so I think all possibilities could happen in that the match, especially in the their last few meet  it is very visible if Manchester United has a really hard time beating Southampton.