Former Old Trafford midfielder Roy Keane has told ITV Football that Michael Carrick's post-match interview in Greece was "just like their [Man United's] performance... flat."
The Red Devils fell to a surprise 2-0 defeat against Olympiacos in a match where they never really tested goalkeeper Jimenez Roberto.
Afterwards, Carrick spoke to Gabriel Clarke, and couldn't quite put his finger on what went wrong for the reigning Premier League champions.
Watch Carrick's post-match interview, below, and what Keane had to say afterwards.
Do you agree with Roy Keane? Let us know @ITVFootball