Rio Ferdinand accused Manchester United of "lacking professionalism" as they slumped to a 1-0 loss at Basel in the Champions League.
The defeat in Switzerland is unlikely to prevent Jose Mourinho's side reaching the last-16 stage.
But it was still a setback to the Red Devils and their Portuguese boss.
And former United captain Ferdinand criticised the display, particularly the second-half showing which followed a promising start from the visitors.
Ferdinand said on BT Sport: "It's what you wouldn't really associate with a Jose Mourinho team -- and that's lacking professionalism.
"I think second half they lacked that discipline.
"How many times, wave after wave of attack getting beyond the Manchester United midfield -- it just wasn't good enough second half."