Pep Guardiola has warned that Rodri must 'control himself and his emotions' after being sent off against Nottingham Forest on Saturday.
City were 2-0 up at the Etihad when Rodri was given his marching orders after a clash with Morgan Gibbs-White at the start of the second half.
He will now be dealt a three-game suspension, which will include missing a crunch-clash with last year's closest rivals for the title Arsenal.
The Spaniard has been a key player for Guardiola's men this season and for a number of years, but they will now be forced to adapt in his absence following an outburst during the game.