Arsenal manager Arsene Wenger has admitted that Tuesday's Champions League group match against Olympiacos at the Emirates is a 'must-win' game.
The Premier League outfit suffered a shock 2-1 defeat to Dinamo Zagreb in their opening European match earlier this month.
With back-to-back games against Bundesliga giants Bayern Munich coming up in the fixture schedule, Wenger understands the importance of grabbing three points this week.
"You must win your home games, it's as simple as that," Wenger told reporters in a press conference. "Both teams will always try to go forward. At home, teams try to regroup and you have to be clinical."
Arsenal are currently third in Group F.
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