I heard the worst manager in the history of the Premier League, Frank de Boer - seven games, seven defeats, zero goals - saying that it was bad for Rashford to be managed by me because he would never play.
England global Rashford scored twice for United in their 2-1 victory over Liverpool on Saturday, having made his first start since Boxing Day.
He incurred the United manager's wrath by telling BT Sport that it's "a pity" Marcus Rashford plays under Mourinho after the England worldwide marked his first league start of the year with both goals against Liverpool.
"But Mourinho is not like that".
Frank de Boer was brutally slammed by Jose Mourinho today as "the worst manager in the history of the Premier League".
"If he was coached by Frank he would be coached how to lose because he lost every game".
De Boer won four straight Dutch league titles as Ajax boss between 2011-2014.
Mourinho went on to credit United's academy staff and his predecessor Louis van Gaal for their role in Rashford's development and insisted the player remains in safe hands under his own leadership. Does he play every match from the start? No?
The 20-year-old has played in 93 matches since the manager began his reign in August 2016, as both as a starter and substitute, which is 12 more than the second-highest appearance maker David De Gea, and 13 more than third-placed Ander Herrera and Anthony Martial.
The La Liga club held Liverpool 2-2 at Anfield in the groups before coming from behind to draw 3-3 at home, and are more than capable of getting the away goal that could prove fatal to United's progress. "Analysing a performance for me is more than number of goals or assists, and for me I'm really happy with Marcus".
The £89 million French midfielder missed the clash with Liverpool through injury, but Mourinho confirmed he returned to training on Monday.
"Sevilla and Brighton are more important than Liverpool". Only Manchester City, from the top six, we haven't beaten, at this moment. I try to give the best to the kids, education.
Sevilla coach Vincenzo Montella is an open admirer of Mourinho having admitted to reading the Portuguese's book for inspiration early in his managerial career.
"But my experiences of the past - I understand that's part of the game".
"He's very young, he needs games. We've only been there once before and that was 60 years ago". The brace on his Manchester United debut followed by another two on Premier League debut, the Manchester derby victor, an England debut goal and Sunday's double against Liverpool instantly come to mind.
Asked if he feels he has the conditions to bring a fourth European Cup to Old Trafford, Mourinho said: "Not yet, but when a team reaches the last eight anything is possible". But when a team arrives in the last eight, anything can happen.