Guardiola insists Bolton outshone former City teammate Jadon Sancho on the day.
He said, “I saw many good things. Luke Bolton is a winger but played at right-back today for the first time. He won all the duels against Jadon Sancho and these players – he did it really well.
“Douglas Luiz was with us for the first time and Jason Denayer is a right-footer, who played on the left. Eric Garcia is 17 or 18 and played like he is 24 or 25 and Riyad played good in his first game.
"It will be a good experience for them (the young players) to realise they can compete (at senior level) and play well. That is the most important thing in that period and then as soon as people come back, we will know what we need for the first games against Chelsea and Arsenal."