Celtic manager Martin O'Neill insisted his side can still reach the Europa League knockout stages after a 4-1 defeat by Benfica in Lisbon left them without a point from their opening two league-phase matches.
Celtic have now lost both fixtures, following a 3-1 home defeat by Ferencváros on 17 September. With the competition using a single league table rather than traditional groups, they must climb the standings quickly to have any chance of progressing.