Chelsea head coach Antonio Conte felt referee Michael Oliver should have stopped play for a foul on David Luiz before the defender was sent off in Sunday's goalless draw with Arsenal.
Luiz was shown a straight red card late on for a poor challenge on Sead Kolasinac which saw both benches rise to their feet.
The Brazil defender, who had earlier been booked for catching Laurent Koscielny with an overhead kick, now faces a three-match suspension which would include the Premier League visit of Manchester City.
Conte reckons Luiz was fouled by Alexis Sanchez prior to the challenge which saw him dismissed three minutes from time.