Stones has not featured for City since March due to an ankle injury but, after three games as an unused substitute, is set to return to face Newcastle on Wednesday.
There are four Champions League last-16 ties to be completed, including City against Real.
"There is not one person who knows Real Madrid better than me, their potential and history, and we have to play this game". "We did it because of the lack of preparation for all the teams, we had just two or three weeks before the start of the competition and because of the weather conditions". We have to avoid this.
"Hopefully we can be lucky to convert what we produce and to defend".
"On the transfer market we speak at the end of the season", Guardiola told a news conference on Tuesday.
"I was not able to solve this problem that we had since the beginning", said Guardiola, who was wearing a Nina Simone T-shirt with a message reading, "Love Simone, Hate Fascism".
"I understood why they were, but I thought it should've been at the referee's discretion in games - if the temperature were up in the 70s or the 80s [Fahrenheit], and they felt that players needed a drink".
The British government has said selected global sports stars travelling to Britain will be granted exemption from quarantine requirements.
However, a final decision on whether it will be at the Etihad Stadium or a neutral venue in Portugal is still to be made by European governing body UEFA. I never spoke with any people from UEFA.