Guardiola was unhappy with the length of the grass as City drew 3-3 at Real Madrid in the first-leg of their Champions League quarterfinal.
He said: "I imagine people will have had a good time. You are worried all day about how you control the Madrid transitions, but it is impossible. The best thing has been with 2-1 the match was at risk and we have been exceptional. We have played it very well. Little by little we have been generating more danger."
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About the new Santiago Bernabu stadium, the Catalan did not hesitate to respond with irony: "I like to see the sky, but the truth is that the stadium is impressive.
"The next step for Florentino (Perez, Real president) is to take care of the grass!"