Ten Hag later said, "I think it was a good performance overall, we went 1-0 up and we had our moments after it to score the second one.
"We defended very well and there were two defining moments when we nearly made a breakthrough and conceded the first goal.
"Then you are disappointed, we have to accept it and still were had the opportunties to at least get one point, but the win was also possible."
On Kyle Walker's apparent foul on Marcus Rashford, Ten Hag said: "I looked back and asked Rashy (Rashford) if there was contact, maybe soft but there was contact."
On his tactics, he added: "Getting behind the defending line with the speed of Garnacho, already after a couple of minutes there was some good breakthrough and then quickly after it was a good goal from Rashford.
"We closed the middle very good and the box very good.
"We stuck to the plan and we had the moment of the reckless action of the goalkeeper of City and after that attack we conceded the goal."