Arsene Wenger admitted Arsenal were just not convincing enough as they ended their Champions League Group F campaign with a 3-1 defeat in Olympiacos - but the Greeks missed out on the knockout stages.
Despite qualification and top spot already secure before the clash in Athens, Wenger - taking charge of his 200th European tie - expected better as defensive lapses from what was an experienced back four again proved costly as the visitors trailed 2-0 at the break.
"We had the early chances, but Olympiacos played a very committed game and made a good battle," said Wenger. "We lost too many balls in the first half and overall became a bit insecure. I am annoyed because we lost the game, it is difficult to single [anyone] out. Offensively and defensively we were not convincing."
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