The defeats is United’s worst run in the Premier League era, though five points is their lowest return after five games, under Louis van Gaal in the 2014-15 season.
Ten Hag rejected that his side were in crisis on the pitch after a turbulent fortnight off it. Jadon Sancho has been banished from the first-team squad and Antony given a leave of absence after assault allegations.
“We have to be very disappointed and annoyed at ourselves,” he said. “We will turn this around. But there is a demand on us to win games.
“Definitely that is something that bothers me [form] but also I have to see the way we play [which was good] but it’s about character. Now we have to see how strong we are and how the team sticks together.”
On Wednesday, United travel to Munich for the start of their Champions League campaign.
“Bayern Munich is one of the favourites to win the Champions League so we have to be good there and I already explained we need character, belief, resilience, determination,” said Ten Hag.