West Ham United's Under-18s were made to rue two moments of defensive sloppiness in their 2-1 Barclays U18 Premier League defeat at Wolverhampton Wanderers on Saturday.
The Hammers switched off from two corners either side of half time and paid the ultimate price on both, meaning Kieran Bywater's free-kick counted for little.
There was little to choose between the sides in a scrappy opening period, which saw Jordan Brown go close from a half chance.
However, Wolves managed to edge in front from a set play, and they repeated the trick just three minutes after the break.
West Ham rallied, with Jerry Amoo hitting the post and Jamie Harney having a header cleared off the line.
Bywater then halved the deficit with a free-kick right out of the top drawer, and although the young Hammers ended the contest strongly, time was against them in their efforts to find a leveller.
Academy Director Tony Carr MBE was frustrated that set plays proved to be the Hammers' downfall.
He said: "It's disappointing because we knew their strengths were at set pieces and we'd done a lot of work on them in the week before the game.
"To lose a marker again so soon after half time, when we had worked on organising ourselves was disappointing too.
"The pleasing part of the performance was in the way we rallied. Our heads could have dropped, but they didn't and Kieran Bywater scored a fantastic free-kick."
West Ham United: Nemrava, Girdlestone, Mavila, Harney, Burke (Knoyle 57), Makasi, Amoo, Parfitt-Williams (Cullen 57), Martins (Sheriff 72), Bywater, Brown