Wenger elected to pick David Ospina instead of first-choice goalkeeper Petr Cech at home to Olympiakos, but the Colombian committed a first-half howler, palming a corner into his own net, as Arsenal lost 3-2 to register a second consecutive Group F defeat.
STAND-IN goalkeeper David Ospina had a night to forget as Arsenal slumped to a 3-2 home defeat against Olympiakos to leave their Champions League hopes in jeopardy.