Ten Hag is the first United manager in over a century to lose his first two games. United, the 20-time champions of England, sank to the bottom of the Premier League table.
Cristiano Ronaldo's attitude is also concerning for Ten Hag and his coaching staff.
Ronaldo is said to be training well, he exchanged words with Ten Hag's No 2 Steve McClaren at the final whistle after refusing to applaud United's travelling fans, and there is a feeling that his mood is having a negative effect on the dressing room.
However, United have dismissed suggestions that Ronaldo's contract could be cancelled, and reiterated that he is staying at the club.