Manchester United's Head of Academy Nicky Butt was frustrated with his Under-19 players in the 2-1 defeat at Basel, which ensured the Reds surrendered top spot in Group A to the Swiss side.
Despite Tyrell Warren pulling a goal back, United were unable to recover from a two-goal deficit and now lie in second place, two points adrift, but still a couple of points clear of Benfica in third.
There is all to play for in the final round of games, with CSKA Moscow heading to Leigh Sports Village for a key encounter.