Celtic's hopes of progressing in Europe were dealt a huge blow.
Celtic fans have taken to Twitter to express their disappointment after their hopes of remaining in Europe were dealt a massive blow as they lost 2-0 at home to Borussia Monchengladbach.
A promising draw against Manchester City meant that the Hoops went into Wednesday's game third in their Champions League group, knowing that a solid return of points from their two clashes against Gladbach would leave them with one foot in the knockout stages of the Europa League.
Celtic manager Brendan Rodgers before the game
But after a goalless first-half at Parkhead, a mistake from Kolo Toure allowed Lars Stindl to open the scoring just before the hour-mark.
And it was Toure again that was responsible for the Bundesliga side's second as his misplaced pass led to Andre Hahn's clincher 13 minutes from time.
The defeat leaves the Bhoys bottom of the group. And with ties against Barcelona and Manchester City still to come, it is surely imperative that they go and get three points when they travel to Germany at the start of November.
But with the defeat suggesting that that is going to be a considerable task, Celtic fans have taken to social media to vent their frustration as their hopes of continuing their European dream look extremely bleak.
Unsurprisingly, Toure's performance was the main talking point amongst the supporters. But while some criticised the veteran centre-back, others expressed some sympathy for the summer signing and suggested that his lack of appearances were to blame for his struggles.
Kolo Toure ... the utmost respect 2 u. No one can deny ur comitment #Celtic— Paul Hainey (@PCRHainey) 19 October 2016
Can't blame Toure. Two awful mistakes but kept us in it before that. Whole team bar the subs had their head in the clouds all night. #Celtic— David Docherty (@daviddc2m) 19 October 2016
Toure had a poor showing tonight.— David Mc Weeney (@ABhoysVoice) 19 October 2016
Maybe his lack of games domestically (any at all lately? Erik & Simunovic only) might be showing.#Celtic
Kolo Toure turns in an Efe Ambrose-esque performance at just the wrong time. Beaten by a much better team. #Celtic— David McNeil (@sneakymcdave) 19 October 2016
Asking Toure to step in & perform on the Big Stage after missing last 4 games is typical Celtic!!! #Celtic— Dom Schiavone (@Shiv1888) 19 October 2016