City won 2-1 in a below par performance.
And on Sane, Guardiola explained: “The last game, Phil Foden was not in the squad. It was so sad for Phil, and I am sad for Leroy now but we have a squad, with six strikers.
“That's why we decide this game he won't be there. He needs to work hard now and make sure he is there."
Guardiola had praise for goalscorer Raheem Sterling.
“Especially in second half, he was clever, he moves the way we need to be stable. The wingers make stability in the team and he did it well."