Former England defender Jamie Carragher did not hold back in his assessment of Tottenham centre back Eric Dier's nightmare at Old Trafford, speaking to SkySports Monday Night Football.
Dier was one of many Spurs player to underperform in Sunday's 3-0 loss to Manchester United, but Carragher felt Dier's poor play was a contributing factor to disappointing displays from those around him.
He said that the defender could have done a lot better in the lead-up to United's opening goal, scored by Belgian midfielder Marounae Fellaini.
Carragher said: "His positioning caused them major problems. I don't think it was that difficult to fix. Young Eric Dier, still learning the position, if his positioning would have been better, he would not have affected too many people around him.
"He's got to cover his full-back, and if he does that Mason can stay there in front of him (Fellaini), and that kills the problem.
"When playing centre-back its about trying to read the game. If Eric Dier is in that pocket (of space), he (Fellaini) won't run. It was basic back four play, whether Fellaini was there or not. It was like Lovren at Old Trafford, its a basic problem he can fix."
Pochettino's options with Dier
Dier has made immense progress in his debut season at Tottenham, proving a bargain since signing from Sporting Lisbon.
The natural temptation would be however after his underwhelming display against United, to take him out of the side and replace him with Federico Fazio, who had done little himself in the first place to warrant being dropped.
Head coach Mauricio Pochettino must however assess whether this will affect Dier negatively or positively, or whether he should give the defender a chance to play through it in the last game before the international break, rather than dwell on the game at Old Trafford for a fortnight at least.