MANCHESTER, England -- Pep Guardiola has confirmed his altercation with John Stones on the Manchester City bench was because the defender was not ready to come on.
Stones was called on to replace the injured Rodri in the 41st minute of the 5-1 win over Atalanta in the Champions League on Tuesday.
- Champions League group stage: All you need to know Guardiola appeared frustrated with Stones before he took to the field and the City boss has reminded his substitutes they are expected to be prepared whenever they're needed.
- ESPN Champions League fantasy: Sign up now!