Manchester City's defensive crisis has worsened with news John Stones will be out for up to five weeks after picking up a muscle injury in training on Tuesday.
City boss Pep Guardiola confirmed the news at a prematch news conference ahead of their Champions League opener against Shakhtar Donetsk on Wednesday.
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The Premier League champions are already without Aymeric Laporte ruled out for four or five months.
City lost to Norwich 3-2 on Saturday, leaving them five points behind Liverpool at the top of the Premier League.