"I'm happy with the performance and I think over 90 minutes we controlled it. There was one moment that could have changed the game and that is where we need to improve but overall we controlled it," Ten Hag said.
"They changed the system and we didn't anticipate that. It can't happen. That is still a moment where we have to learn and improve as a team if you want to be top. Those moments can't happen.
"We almost let them come into the game and we can't allow an opponent to get back into the game when we started so good. We dictated it totally then in one moment it can change. We need to avoid that.
"I think in the second half we were much more composed and we tracked them. It was much better."
Rashford, Weghorst and Bruno were on target for United against Nottingham Forest in the Carabao Cup.
