Nick Coppack reviews each player's performance...
David De Gea An unhappy return to Spain, although he'll be pleased enough with his individual performance. No chance with either goal and made a handful of top second-half saves.
Rafael The young Brazilian was given a torrid time by Iker Muniain, who looks one of Europe's top young prospects. A tough outing.
Jonny Evans Often left exposed after United's full-backs had gone forward, Evans had to do a lot of "mopping up". A thankless task on an evening to forget for the Reds.
Rio Ferdinand Gave up a yard of space for Athletic's opener but was otherwise solid enough at the heart of defence. Replaced midway through the second half after picking up a slight calf knock.
Patrice Evra Pegged back by the lively Markel Suaseta for much of the game, Evra struggled to make his mark. A difficult day at the office for the Frenchman.
Ji-sung Park Not even the South Korean, usually so effective at breaking up attacks, could stem the Athletic tide. Saw little of the ball in possession.
Michael Carrick Competed well in the first half in midfield and intercepted several Athletic attacks. Tried to launch attacks from a deep position but his influence faded after the break.
Tom Cleverley A disappointing first European campaign for the youngster, who was never given time on the ball to express himself or dictate the pace of the game.