Guardiola told BBC Sport: "It's unacceptable. It's really unacceptable. Coventry, United, Chelsea don't play in the week and they had us play today. Next week, on Friday, will be better."
Asked by presenter Gary Lineker if he felt unfairly treated, Guardiola replied: "It's impossible. For the health of the players. It's not normal, honestly, it's not normal. So because I win I have the courage to tell you and in defeat I would shut up but it's not possible. It's unacceptable to go 120 minutes, all of you are football players, the emotion to play Madrid, the semi-finals, the way we lose and everything, so honestly, I know in this country it's special for many reasons, but it's for the health of the players. I don't understand how we survived today."
Asked if he had raised it with the FA, he replied: "Gary, do you think our demanding is going to change something? The only power I have I say here, it's not going to change anything. I've known it for many years but why do you play today and not tomorrow when Coventry, United and Chelsea don't play in midweek? Why? Why not have one more day for the health of the players?"