Jose Mourinho has been charged by the Football Association over comments he made after Manchester United's Premier League victory against Newcastle on 6 October.
The United manager spoke into a camera after his side came from behind to triumph 3-2 at Old Trafford.
The FA alleges Mourinho's language was "insulting and/or abusive and/or improper".
An FA spokesperson said: "Jose Mourinho has been charged following Manchester United's game against Newcastle United on 6 October, 2018.
"It is alleged that his language at the end of the fixture, as captured by the broadcast footage, was abusive and/or insulting and/or improper. He has until 6pm on 19 October, 2018 to respond to the charge."
Mourinho could potentially face a touchline ban if found guilty.
The match was played amid a tense atmosphere with the club having denied a report earlier in the day that Mourinho was going to be sacked that weekend regardless of the result.
United recovered from 2-0 down to complete a dramatic comeback with a 90th-minute goal from Alexis Sanchez.
Footage from the game shows Mourinho saying something - at one point while looking into a camera - as he headed towards the tunnel following the final whistle.