Garry Monk was left perplexed at the naivety of his Middlesbrough side as they went down at Millwall.
Goals from Jed Wallace and George Saville set the Lions on their way to victory, and despite Stewart Downing pulling one back for Boro, it was Millwall who took all three points.
And Monk was particularly frustrated at the way his side failed to cope with Millwall’s direct approach, having warned his players of what to expect before the game.
He said: “At the risk of repeating myself, it’s just naive, it’s extremely naive.
“We know coming here, we’ve prepared the players all week, the direct play it’s going to be. That battle, that physical element to it, in terms of competing for those second balls, very direct stuff.
“To then be so naive and lose a lot of those battles in that first half in important areas and again in leading to the goals, it’s naive, schoolboy stuff. I’ve said it too many times this season.
It’s never through a lack of effort within the group. It’s just comes back to naivety. I feel like a broken record at the moment. Schoolboy errors, so avoidable and basic stuff.Middlesbrough boss, Garry Monk
“It’s never through a lack of effort within the group. It’s just comes back to naivety. I feel like a broken record at the moment. Schoolboy errors, so avoidable and basic stuff.
“And you don’t expect that from the level of players we’ve got, but unfortunately it’s happening too many times this season, but we have no other choice but to try and come through it.”
Millwall manager Neil Harris, said: “Top teams don’t particularly like coming here this season. We have to make it hostile, intimidating.”
Millwall: Archer, Romeo, Hutchinson, Cooper, Meredith, Wallace, Tunnicliffe, Saville, O’Brien (Craig 86), Morison, Gregory (Williams 74). Unused substitutes: McLaughlin, Thompson, Martin, Elliott, Twardek.
Middlesbrough: Randolph, Christie (Traore 80), Ayala, Gibson, Da Silva, Howson (Gestede 59), Leadbitter, Downing, Bamford, Braithwaite (Johnson 80), Assombalonga. Unused substitutes: Konstantopoulos, Friend, Shotton, Forshaw.
Referee: Oliver Langford (W Midlands).