Manchester United have decided not to appeal against Casemiro's suspension after the midfielder was shown a straight red card during Sunday's 0-0 draw with Southampton on Sunday.
Casemiro was initially given a yellow card for his challenge on Carlos Alcaraz, before referee Anthony Taylor upgraded it to a red card after reviewing the incident on the pitch side monitor.
Man United will not make an appeal to the Premier League and the Brazilian international will serve a four-match ban. This means that Casemiro will be ineligible for Manchester United's trip to St James' Park to face Newcastle United after the international break on April 2.