Anthony Stokes concedes Celtic's Champions League campaign has faltered in front of goal but the striker is looking to make amends in the final fixture against Barcelona in the Nou Camp on Wednesday night.
Neil Lennon's men qualified for the last 16 of the competition last year but have three points from five Group H games and are guaranteed to finish bottom of the section this season without even the safety net of Europa League football in the new year.
Celtic have only scored two goals in the group, both in the 2-1 win over Ajax at Parkhead in October, which led Republic of Ireland forward Stokes to say: "We just haven't taken our opportunities in front of goal.
"We have played good football and competed very well in the games but maybe we haven't had the break of the ball or were as ruthless as we were last year, it's as simple as that.
"We are obviously disappointed that there is not more to play for tomorrow night but it is still a massive game.
"It is a game we want to compete in and like any other game, we will try to get a result.
"We want to go out on a positive note. It will be a difficult task but we will try our best to win the game."