The former Benfica goalkeeper produced a world-class performance and kept his side in the game with a string of brilliant saves.
Merged a good understanding alongside Maniatis as they worked in unison to effectively keep Cardozo quiet. He was exposed by the movement of Markovic on a few occasions.
He was dominant in the air all game and scored the game's only goal, ghosting into the Benfica box unmarked to power a header past Artur.
The left-back got into some brilliant advanced positions and provided the corner for Manolas' goal.
He was outplayed in the middle of the field by the likes of Ruben Amorim but provided a good shield to the Olympiakos defence.
The midfielder offered very little going forward and he sometimes struggled to deal with the movement of Pereira on the overlap.
The Olympiakos captain showed his leadership and experience to guide the defence to their second clean sheet of the group stage.
The marauding right-back was often exposed by Gaitan but showed brilliant stamina to aid the attack whenever possible. Missed a glorious chance to wrap up the points in stoppage time.
The Mali international struggled to create openings and was substituted amid fears he would get sent off.
For a striker in such good form, he was particularly anonymous. He was always willing to track back but struggled to seriously test the Benfica defence.
He failed to impress against his former club and hardly touched the ball in the first half before being substituted at the break.
He was not seriously tested in the first half and can feel let down by his defence who failed to pick up Manolas for the opening goal.
The Uruguayan was booked for a distasteful dive in the first half but his willingness to get forward helped push Olympiakos deep into their own half.
He provided an excellent attacking outlet on the overlap although he missed a good chance to score the equaliser.
The Brazilian went close with a header in the first half and contained the threat of Mitroglou with relative ease.
He produced a series of good challenges and headers to keep the opposition away from Artur's goal and was rarely exposed at the back.
Alongside Matic, he helped Benfica to dominate the midfield battle and his good range of passing helped to spring many attacks for the visitors.
He broke up the Olympiakos attacks effectively but missed a wonderful chance in the first half to level the score.
His intelligence and ability to pick a pass ensured he was one of Benfica's most creative players. His wonderful dinked pass for Markovic should have led to the opening goal.
He constantly got the better of Leandro Salino down the left and produced some teasing deliveries into the box. However, he was motionless as Manolas ghosted in behind him for the opener.
The young Serbian striker made some promising runs behind the Olympiakos defence but failed to produce the finish to match, spurning several brilliant opportunities.
The Paraguayan had one good chance early on but struggled to get into the game and was eventually forced off through injury.
He came on in the closing stages to add a defensive mindset to the midfield.
The Congo international midfielder helped add stability to the labouring Olympiakos midfield.
He scored against Benfica in Portugal but struggled to fashion any openings for the hosts despite his willingness to run at the defence.
Was introduced in a bid to add fresh legs and pace to the side but made little impact on the wing.
The former Olympiakos man made an impact from the bench and was brilliantly denied by Roberto in the closing stages of the game.
The Brazilian forward came on for Cardozo but struggled to get the better of Manolas and Maniatis, often finding himself beaten in the air.