It was the first time Guardiola had lost a domestic cup final in England, after four League Cup and two FA Cup successes.
“It’s normal teams can lose finals but this season has been extraordinary, fighting for all the trophies in a good way,” he added. “We’ll rest and come back next season.”
Guardiola was asked if his side was sluggish, but said: “No. For my decisions we were not in the right positions to attack them. My mistake, my gameplan was not good.”
When asked what he was trying to do, he added: “The players know the reason why. Tactically, it was not good. I was not good today. You plan a game for different positions but it didn’t work.
“Always when we play against United, we have the control and we created in the second half but we were not able to do it.”