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Manchester City manager Pep Guardiola has said John Stones needs to improve his fitness record if he's going to fulfil his potential at the club.
The centre-back moved to the Etihad Stadium in the summer of 2016 and was considered one of the most exciting young defenders in European football. However, since making his transfer, he's found it difficult to kick on.
In recent years, Stones has also suffered with a number of injury issues, and he's been unable to help City's defensive crisis this termas a result of various layoffs.