Celebration: Alejandro Dominguez (centre) wheels away after scoring the opener in Greece
Outstretched: David De Gea is well beaten by Campbell's shot in the 55th minute to deflate United
Home comforts: Olympiacos became the first home side so far to win their first-leg in the last 16
No chance: De Gea sees the ball fly past him in the 37th minute to put the hosts 1-0 up
Down and out? David Moyes slumps back into his seat after Olympiacos score their second goal
Down: United's performance was ordinary in the heated atmosphere of the Karaiskakis Stadium
Not happy: Wayne Rooney reacts to the referee early on after not being given a free-kick
Clueless: United players look frustrated as Dominguez runs away in celebration at the first goal
Golazo: Campbell wheels away with his team-mates as Olympiacos took an unprecedented 2-0 lead
Desperate: Moyes' last hope of silverware this season is in Europe, but they have an uphill task
50/50: Olympiacos' Leadro Salino (left) fights with United's Ashley Young
Not happy: Rooney discusses another matter with referee Gianluca Rocchi after the second goal
Nowhere to be seen: United were outplayed in every area in Greece on Tuesday night
Elated: The win means Olympiacos should be favourites to win the tie going into the second-leg
Contribution: Olympiacos' Giannis Maniatis had the original shot for the first goal
The other end: Olympiacos' goalkeeper Roberto celebrates the opening goal
