Pep Guardiola says there need to be a culture change in refereeing.
The Manchester City boss has criticised the lack of protection for his players during yesterday's 2-nil FA Cup fourth-round win at Cardiff.
Leroy Sane could be out for months after suffering an ankle injury in a foul from Joe Bennett, who was sent off later in the game.
Guardiola says officals need to take stronger action.
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Chelsea are also through to this evening's last 16 draw.
Michy Batshuayi scored twice as they recorded a comfortable 3-0 win over Newcastle at Stamford Bridge.
