Celtic really didn't help themselves during their Europa League second-leg against Copenhagen, with individual mistakes directly contributing to two of the away side's goals, while the other was poorly defended.

Jozo Simunovic is one of the culprits in this, as he pretty much gifted the Danish giants their first goal of the game.

When a long ball was played over the top, he undercooked his pass back to the goalkeeper, which started off the calamitous defending that led to Michael Santos scoring.

As per WhoScored, the Croatian completed two of the three tackles that he attempted, as well as making five clearances and four interceptions. In addition to that, he won nine of the 12 aerial duels that he competed in.

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Despite these fairly impressive statistics, the severe lack of concentration and conviction that led to the opener is what his game will be defined by.

This has left plenty of Celtic fans seething with the 25-year-old after the full-time whistle.

Some have even gone as far as to say that he should be sold, while one fan instructed the club to "terminate his contract tonight".

The defender has now started 13 games and come off the bench once this season, across the SPFL, Champions League and Europa League, hinting that he is dispensable for the club.

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This performance has certainly not helped his cause with the fans, as he has now become a target for their frustrations.

Meanwhile, one midfielder has been slated by Celtic fans after the loss.