Having been to war with one of his high-profile names during the day, Mourinho was dumped out of the Carabao Cup in the evening by his old midfield golden boy Frank Lampard in another dismal day for Manchester United.
They were beaten by a Championship club, who not only came to Old Trafford with young hungry players, and dedicated old Football League warriors, but played some ambitious passing football and deserved this penalty shoot-out win.
An equaliser from substitute Marouane Fellaini in the fourth minute of time added on at the end of the tie looked like it might have saved United – setting up a monumental penalty shoot-out in which the first 15 spot-kicks were scored.
Then up stepped Phil Jones and the Derby goalkeeper Scot Carson finally got behind one to win the tie.
It just goes from bad to worse for Mourinho, who stripped Pogba of the captaincy earlier in the day and needed his side to respond to their manager's show of power.