Arsene Wenger has held a heated training ground inquest into his side's 3-2 defeat to Olympiakos in which he criticised his players' poor attitude and lack of passion.

The Arsenal manager, who witnessed a second successive Champions League group stage defeat on Tuesday night, is not known to aggressively dressing-down his charges after embarrassing performances but made an exception on this occasion, according to the Daily Mail.

During their customary post-match debreif at their London Colney base, a time in which players are usually encouraged to express the opinions and hold a healthy debate, Wenger instead excoriated his squad and demanded that they improve in the coming weeks.

Arsenal 2 Olympiakos 3 player ratings Show all 11 1 /11 Arsenal 2 Olympiakos 3 player ratings Arsenal 2 Olympiakos 3 player ratings David Ospina: 3 out of 10 Managed to drop the ball into his net under no pressure whatsoever. Wenger may have taken an unneccesary gamble promoting the keeper to his starting XI but he would hardly have expected such an abysmal response, though Ospina couldn’t have done much about the first. Getty Images Arsenal 2 Olympiakos 3 player ratings Hector Bellerin: 6 out of 10 Salino struggled to keep up with the pacey Spaniard who attacked with verve when Oxlade-Chamberlain cut in. That thrust was allied with more dependable defending than a great many of his colleagues provided. Getty Images Arsenal 2 Olympiakos 3 player ratings Gabriel: 5 out of 10 A foolish yellow card on the stroke of half-time left the Brazilian walking an unnecessary knife-edge in the second 45 minutes. His commitment and passion is all well and good, except playing at a constant boiling point tends to leave you in those situations too often. Getty Images Arsenal 2 Olympiakos 3 player ratings Laurent Koscielny: 6 out of 10 On several occasions the defender was the last line between Arsenal’s porous midfield and Brown Ideye. His interceptions kept the hosts in the game throughout the first half. Getty Images Arsenal 2 Olympiakos 3 player ratings Kieran Gibbs: 5 out of 10 Too often he and Alexis Sanchez seemed to be operating on entirely different wave lengths, with the reserve left-back earning a berating from his teammate for one particularly sloppy pass. He was also guilty of switching off for the visitor’s third. Getty Images Arsenal 2 Olympiakos 3 player ratings Santi Cazorla: 5 out 10 His defensive deficiencies were on display for Olympiakos opening goal. Converted attacker or not he should have known to close down the opponent on the edge of the box. As a leader he was perhaps worse, remonstrating with the referee and letting the occasion get the better of him in a way that could have spread to his colleagues. Getty Images Arsenal 2 Olympiakos 3 player ratings Francis Coquelin: 5 out 10 Played like a man rushed back from an injury, though of course Wenger had no choice. He struggled to stem the tide of runners from deep and could not keep up with the likes of Pardo. This was not Coquelin at his authoritative best and it was little wonder he was removed early. Getty Images Arsenal 2 Olympiakos 3 player ratings Alex Oxlade-Chamberlain: 5 out of 10 It turns out if you say a player has no confidence he will play as if that is the case. His running was as purposeful and direct as ever, but when opportunities came he seemed to lose faith in his abilities. Getty Images Arsenal 2 Olympiakos 3 player ratings Mesut Ozil: 6 out of 10 On more than one occasion he pulled off the sort of beautiful pass only he is capable of, and his willingness to come deep helped Arsenal start many of their best counters. However in the second half he faded when faced with the massed ranks of Olympiakos defenders, struggling to conjure a way past. Arsenal 2 Olympiakos 3 player ratings Alexis Sanchez: 8 out of 10 On this kind of form you would expect him to dribble past every player on the pitch. Then go round them again just for fun. An irresistible performance from the Chilean, who on nights like tonight is simply a joy to behold. Getty Images Arsenal 2 Olympiakos 3 player ratings Theo Walcott: 7 out of 10 With every passing game Walcott looks more and more a centre-forward. His runs are intelligent enough to find space and he is showing less of the profligacy that has dogged him in the past. He had one chance in the first half; he took it. Getty Images

The Frenchman is said to have refrained from singling out individuals but, nevertheless, made it known in no uncertain terms that he expects to see greater desire, intensity and consistency from his charges.

Tuesday's defeat means Arsenal are now on the verge of Champions League elimination at the initial group stage for the first time since 1999. They can still qualify automatically but, with home and away fixtures against group leaders Bayern Munich still to come, any escape will be an uphill struggle.

Should the Gunners lose both games against the Bundesliga champions, they will need to take maximum points from their remaining two fixtures and hope other results go in their favour.