City face Arsenal on Sunday fresh from the impressive victory over Napoli on Wednesday.
And the City boss, who faced the media on Friday, says Stones and Otamendi have been key to the fine start we've made this season.
"They made something special these past few months," he said. "They play almost all games and they play a high level. They do really well.
"Nico and John...it is amazing what they have done."
You can watch the first half of Pep's press conference via the video above!