Erling Haaland struck both goals for the 2-0 win, though it was Foden who ran the game for Guardiola.
The manager later said, "More mature and everything. He is fine, he is enjoying himself, he is smiling and his body language in training is fantastic.
“The way he moves, he always creates something. The first half was more difficult because we couldn’t who was the man free but the rest was really good.
“Phil can make a step and play like he is like we remember in the past. Last season we were not in our best but Phil every season has been extraordinary. Always.
“You cannot play all the time in sixth gear. You have to use tempo. It was question of time that he would improve and not all the time can be explosive.
“You have to work and make the rhythm. Step by step he will be better.
“Like a good wine, with time he will be better.”