Albion's youngsters fell to a tight defeat to Everton at Damson Park on Monday evening.
Richard Beale's Baggies were undone by a first-half corner, which proved enough to claim the spoils for the visitors in a hard-fought encounter.
Neither side managed to assert any kind of dominance in the opening 15 minutes, cancelling each other out as the game was in its infancy.
The Toffees' Isaac Heath was gifted the first real chance after a slack pass was picked off in the Albion half, but his lobbed effort landed on the roof of the net.
There were similar blushes spared at the other end too, after a strong Albion press paid dividends, only for Dauda Iddrisa to fire just over when well placed in the Everton box.
Deago Nelson had one effort saved, as did Coby Ebere at the other end - but in truth, neither goalkeeper was truly tested in a tight first half-hour.
That was until a wicked corner was delivered into the Albion box, eventually finding its way into the Baggies net and handing the visitors the lead.
Albion came out for the second half with renewed vigour and could have levelled within five minutes of the restart, only for substitute Divine Onyemachi to fire too close to Fraser Barnsley in goal when played in down the left.
Onyemachi fired wide on the hour mark, and Donte-German Ranger did the same a matter of minutes later before Ben Cisse was called into action to save a powerful strike low to his right as the game opened up.
There were chances at either end, with a second goal of the contest looking like a certainty. Unfortunately for the Baggies, that promise failed to materialise and their opponents saw out the final minutes to cast them to defeat.
Albion: Cisse, Maughan, Dupont, Parker (Williams 45), Humphries, Iddrisa, Mandey (Higgins 45, Morrish 65), Whitwell (c), Nelson, Bostock (Onyemachi 45), Ranger.
Substitutes: Wallis (GK).
Watch the WBA TV footage in the video below.
