The Gunners need a win and some help to capture first place in Group B.
Arsenal have already secured qualification to the knockout stage of Champions League, but sit second in their group heading into the final day. They're going to need a win away to Olympiakos, who will not rest their stars despite having nothing to play for, while hoping that Schalke drop points against Montpellier.
When these two teams met at the Emirates Stadium in October, Olympiakos tested Arsenal but eventually fell 3-1, following a stoppage time insurance goal by Aaron Ramsey. The leaders of the Greek Super League are already qualified for the Europa League and can't move up or down in the group, so they're unlikely to be the most motivated version of themselves, but they aren't playing a weak team.
Olympiakos injuries and suspensions
Out: Charalambos Lykogiannis, Jose Holebas, Avraam Papadopoulos, Francois Modesto.
Arsenal injuries and suspensions
Out: Laurent Koscielny. In doubt: Bacary Sagna.
Modesto is the only fit player who will be rested by Olympiakos. Koscielny picked up a thigh strain over the weekend, and Sagna probably isn't fit enough to play yet. He missed the weekend's match against Swansea.
Match date/time: Tuesday, 8:45 p.m. local. 2:45 p.m. ET
Venue: Karaiskaki Stadium, Piraeus, Greece
TV: FOX Sports Net affiliates (U.S.), ITV 1 (U.K.) Sportsnet regional networks (Canada), Nova Sports 2 (Greece)