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After a quiet start, Mikel Arteta has been Arsenal's best player in their last two league games. He has played deeper than expected, but has been active, assured and efficient in midfield.
Motivated by being on the Champions League stage, Arteta needs to orchestrate the game from the middle of the field. He must ensure that Arsenal's possession play remains intelligent and polished throughout the game.
The last time Arsenal entertained Olympiacos, during the 2009-10 season, the game was a dour affair and a stalemate existed for large portions of the game.
The Gunners will have to work hard to break down their opponents tonight, but a smart performance, led by the efforts of these five players, should see Arsenal gain an important victory.
Three straight home wins in all competitions will provide a good deal of momentum heading into Sunday's North London derby.