The Red Devils suffered one of their most embarrassing results in recent years, losing at Old Trafford to Derby County - a second-tier club coached by Chelsea legend Frank Lampard - in penalty kicks to crash out of the EFL Cup.
In a shootout after the game ended 2-2 on Tuesday, the teams scored 15 consecutive penalties before United defender Phil Jones' effort was saved by goalkeeper Scott Carson.
Old Trafford clearly isn't big enough for the both of them and it's hard to imagine that both of them will still be at the club next season.
"[The game against Wolves was] an important lesson; a lesson that I repeat week after week after week, a lesson that some boys are not learning", Mourinho said. "We are here to attack", he said.
"Mourinho's message to the United squad, delivered at Carrington today, was created to underline his authority and remind the players that he is in charge", added The Times report.
"You want me to say we play a phenomenal match?"
Mourinho congratulated his former player and the gesture was appreciated.
United were disappointing once again as they scraped a 2-2 draw in 90 minutes, as Marouane Fellaini rescued the 10-man hosts - who had Sergio Romero sent off - deep into second-half stoppage time.
Early on it seemed like the United boss would get a positive response from his much-changed side as one of Lampard's former Chelsea team-mates Juan Mata slotted home the opener after just three minutes at the end of a fine team move.
In fact, Derby, who played attractive and positive football, could and probably should have had the game won in normal time.
Pogba is a pest and clearly an agitator, always has been, but Mourinho fits the exact same mould.
Defeats against Brighton and Tottenham, coupled with Saturday's draw against Wolves, have left United off the pace in the Premier League and now they are out of the League Cup.
"Somebody has to miss", said Mourinho.
Derby County caused a huge upset last night by beating Manchester United on penalties.
Things got more hard for United when Romero was dismissed for handball outside his area and Derby capitalised through Jack Marriott, but Fellaini forced a shootout with a last-gasp equaliser.