Pep Guardiola has confirmed that Kyle Walker was substituted in Man City's draw with Aston Villa after sustaining an injury.
Walker was replaced after 80 minutes at Villa Park as the Premier League champions dropped points for just the second time this season.
In his post match interview, Guardiola explained that he had elected to replace Walker after the England international had shown signs of discomfort before the break: He had some problem in the first-half,' the City boss said.
Though Walker was adjudged to be capable of continuing after half-time, he was eventually substituted for the returning Nathan Ake in the away side's defence.