Manchester United boss Ole Gunnar Solskjaer blew a fuse after their Champions League defeat to PSG on Tuesday.
The 45-year-old reportedly made sure his players knew exactly how he felt in the changing room afterwards.
"He told them that they tried to play the game as if it was a one legged tie," a source at the Premier League club told The Sun.
"He wanted them to remain patient and not to concede easy goals and they then went and conceded from a relatively easy set-piece and everything just went downhill from there."
United face a difficult task to overturn the 2-0 deficit in Paris next month and will play the second leg without star Paul Pogba. The midfielder was sent off for a second bookable offence late on in the clash at Old Trafford.