Guardiola spoke about the challenge of managing the fierce competition for places within the City squad.
“It's not easy, many players don't play, and I've said many times this this is the toughest period," he said.
“It's the toughest situation. For example, Vinny (Kompany) didn't play in the last game but in training you see him, and he deserves to play.
“Nico Otamendi was the most important central defender for us last season and when we achieved 100 points that was because of Nico.
“Now, this season he is playing less, and it is what it is. When Sane plays he has to play good, it's the same with Raheem."