West Ham United's Under-18s had nothing to show for their efforts from the long journey to Sunderland on Saturday after a second half penalty for the Black Cats sent them to defeat.
Taylor Tombides' second goal of the season brought Steve Potts' side level before the break, but they were unable to capitalise on a bright start to the game as Sunderland made the most of their chances.
Under-18s boss Steve Potts told whufc.com: "It was the same sort of game as last week at Wolves. We played some good football but weren't able to turn that into a result.
"That's where we are at the moment - results aren't the be-all and end-all and the performances have been pleasing, but the next step is to learn to be more ruthless.
"We made an excellent start and had two goals disallowed, as well as creating a one-on-one chance very early. They scored with their first real attack after 15 or so minutes, and it was a case of thinking 'where did that come from?'
"We regrouped and equalised to get to 1-1, and at that stage you want to keep it tight and try to take one of your chances, but they got a penalty and were able to close out the win."
Taylor Tombides tapped in the Hammers' goal from close range after Lewis Page nodded Nana Boakye-Yiadom's centre back across to his teammate.
Potts' men now have four points from as many games in the Tier One stage of the Barclays U18 Premier League.
They are next in action on Saturday 2 March when they make the short trip to face Tottenham Hotspur.
West Ham United: Howes, Alexander, Page, Burke, Harney, Girdlestone, Makasi, Miles (Pike), Boakye-Yiadom (Gilchrist), Cullen (Carter), T.Tombides