Jordan Spence vowed to ensure there will be no repeat of the Development Squad's second-half capitulation at Southampton, one that saw the Saints run out convincing 5-2 winners.
It was all the more galling for centre-half Spence, who knows as well as anyone that the Hammers back four are a great deal better than Thursday's showing suggested.
Though the lure of the Elite Group's top three is now gone, the 22-year-old insists he and his teammates will not be short of motivation for Tuesday's final Barclays Under-21 Premier League fixture at West Bromwich Albion.
He told West Ham TV: "It's disappointing because we've come away getting beaten in an unattractive manner. We've got one more game and more importantly, it's about addressing it individually, collectively and making sure we don't see any performances like that again.
"Every game's important. Everyone in the changing room will want to win and individually everyone will have their own targets, goals and aspirations. You can't let that fizzle out in May."
Reflecting on Thursday's ill-fated trip to the south coast, Spence blamed a lack of consistency for what ensued after the half-time interval. With plenty of senior experience under his belt, the Woodford-born defender was adamant that such lapses are not to be tolerated at this level.
He continued: "We're in the business of making sure we're elite players all the time. And the thing about being a top player is consistency. You don't play at the highest level and you won't play in our first team without consistently performing. Out of character, yes, but it can't happen really.
"We made a good start to the game, scored a good goal and even once we conceded the first goal, which was against the run of play, we did well to get our noses in front again with the penalty.
"We didn't see out the half, which was disappointing. But even with that, I don't think it was a major, major factor, we still felt we were the dominant force in the game and sadly errors cost us in the second half. We weren't as productive in an attacking sense, nor were we as efficient defensively.
"Nobody likes to be on the receiving end of conceding that number of goals. I think anyone who has seen us play as a back four, [knows] we're a lot better than that and that's the end of it really."
In the aftermath of a turbulent outing, Spence reckons honesty is the key to preparing for a trip to the Baggies. That process will already have begun with the players and staff poring over footage to see how and why Thursday's game went awry.
"It's now about learning. There will be some individual analysis and we do unit analysis as defenders, midfielders and attackers. The analysis will be done and then we've got to prepare right for the West Brom game and prepare right for what's to come until the end of the season.
"We're honest with each other. Nick isn't someone who's going to rant and rave, he's someone who's interested in our development, all the way through as players, as individuals and as a team. So, harsh words, but we've got to be honest. There's no point being in this game if you're not going to be honest."