Neil Lennon has strongly condemned Boli Bolingoli's "selfish" behaviour after his trip to Spain resulted in Celtic's next two Scottish Premiership fixtures being postponed.
Bolingoli went to Spain last week, meaning he should have quarantined for 14 days upon his return. However, he did not inform Celtic of his trip and played in their 1-1 draw with Kilmarnock last Sunday.
- Celtic, Aberdeen matches postponed after protocol breaches
- Scottish Premiership fixtures | results | table
Celtic have apologised for Bolingoli's actions - which they described as "beyond explanation" - and say they will take disciplinary action against the Belgian left-back.
Lennon did not hold back when questioned about Bolingoli's behaviour, saying: "Unbeknown to us until yesterday, Bolingoli took a flight to Spain on the Monday and then flew back in on the Tuesday. One day in Spain, there's no logic in that.
"And then decided to keep it to himself, didn't tell anybody, trained all week, put everybody at risk in this bubble that we have created here and then obviously was a part of the squad, played on Sunday, put everybody at risk - the Kilmarnock players as well, the Kilmarnock staff - and then obviously the story broke yesterday and then he came clean.
"In terms of club responsibility, we have apologised to all the other clubs in the division and the footballing support as a whole.
"We were absolutely livid, appalled. The club have been at the forefront of maintaining good practice, the protocols all in place, trying to get the game up and running and we have been bitterly and sorely let down by the selfish actions of one individual."
Scottish Premiership under threat - a timeline
- Aug 1: Scottish Premiership season starts. Aberdeen lose opener 1-0 to Rangers. Eight players visit Aberdeen city centre bar after the defeat.
- Aug 5: Scottish First Minister Nicola Sturgeon announces lockdown measures to be reimposed in Aberdeen after spike in coronavirus cases.
- Aug 7: Aberdeen's match at St Johnstone called off at request of government after two Dons players test positive for coronavirus after bar visit on Aug 1 that breached social distancing rules. Six more players ordered to self-isolate.
- Aug 8: Eight Aberdeen players - Jonny Hayes, Michael Devlin, Scott McKenna, Matty Kennedy, Sam Cosgrove, Dylan McGeouch, Craig Bryson and Bruce Anderson - issue apology for bar visit.
- Aug 8: Celtic striker Leigh Griffiths reminded of responsibilities after hosting birthday party for his girlfriend that breached government guidelines.
- Aug 11: Scottish government threatens to 'pause' the Premiership after news emerges that Celtic's Boli Bolingoli broke quarantine rules.
The situation came just days after Aberdeen's trip to St Johnstone was called off due to two of their players testing positive for coronavirus, with an additional six players being forced to self-isolate.
It transpired the eight players had gone to a bar following Aberdeen's defeat to Rangers on the opening day of the Premiership season, despite the city being under a partial lockdown following a local outbreak of coronavirus.
The actions of Bolingoli and the eight Aberdeen players has led to both of Celtic and Aberdeen's next two Premiership fixtures being postponed.
First Minister Nicola Sturgeon said any further breaches of protocol regarding coronavirus by players could lead to the season being suspended, saying: "By putting this is as clearly as I can in language that the football world will understand, consider today the yellow card.
"The next time it will be the red card because you will leave us with absolutely no choice."
Celtic condemn Bolingoli's 'stupidity'
Bolingoli was issued with a fixed penalty notice by Police Scotland for breaching Scottish Government quarantine regulations on Covid-19.
Police Scotland Assistant Chief Constable Alan Spiers said: "A 25-year-old man has today (Tuesday) been issued with a Fixed Penalty Notice for breaching quarantine regulations.
"The Chief Constable has made it consistently clear that we should all take personal responsibility to do the right thing and remember the purpose of these measures is to aid the collective effort to stay safe, protect others and save lives by preventing the spread of coronavirus.
"Throughout the response to the pandemic, the majority of the public followed the law and Scottish Government advice and it's really important that we all continue to do so.
"Our officers will continue to explain the legislation and guidance but, for the minority who may choose to breach the regulations and risk the health of others, we will not hesitate to take enforcement action where appropriate."
Celtic condemned the actions of the defender in a lengthy statement, saying: "Celtic Football Club unreservedly condemns and apologises for the behaviour of the player Boli Bolingoli in travelling to Spain without informing the club and in failing to observe quarantine restrictions.
"It is difficult to imagine a more irresponsible action in current circumstances and we find it beyond explanation. The club will take immediate action through our own disciplinary procedures.
"Celtic are in touch with every SPFL club today, and with all relevant authorities, to apologise for the fact that one of our employees has created so much additional difficulty through his actions.
"All of our playing and backroom staff have been tested twice for COVID-19 since this incident and all, including the player in question, have tested negative. While this comes as a relief to all concerned, it in no way diminishes the seriousness or stupidity of the player's actions.
"Since the COVID-19 crisis began, we have had a safe and healthy squad of players, recording not one positive test. As a club, we have worked tirelessly to ensure a sustained, safe environment for all."
'I'd be surprised if he wore a Celtic jersey again'
Sky Sports pundit Kris Boyd:
"I think it's a disgrace to brutally honest. It's a lack of respect for your team-mates first and foremost, to leave the country, there's no words, it's terrible.
"The First Minister when she spoke today has more or less thrown it back to the SPFL and the SFA to show that they are fit and proper to deal with the situation, and it's over to them."
Sky Sports pundit James McFadden:
"He's made the decision to leave the country. He's broken the rules, he's let the club down, he's let the whole of Scotland down. It's a dangerous thing to do.
"To come back shows a total lack of respect for the game, his team-mates, the club, the whole country. I just can't believe a player could make that decision. I'd be very surprised to see him in a Celtic jersey again."
Rangers boss Steven Gerrard, who was part of a meeting with Scottish government officials on Monday where the safety protocols around coronavirus were again highlighted, described the warning as a "wake-up call".
Speaking to the media ahead of St Johnstone's visit on Wednesday, he said: "It is a wake-up call and a strong message from the government and also a reminder of what could happen if mistakes continue to happen.
"It is a concern and it is a worry because if mistakes continue to happen there's no doubt that the football season will be cancelled. That's not what I want or what anyone wants at Rangers.
"I don't think we're putting any extra measures in but what we are doing is going to remind everyone of our responsibility and our behaviours during this time.
"Up to now I think everyone's done extremely well here at Rangers. The medical department have been fantastic ever since lockdown really, keeping us updated of the situation.
"But it's just reminders really, to the players and to the staff, that we have to behave in the right way and keep doing the right things."
'Scottish game can't afford to shoot itself in the foot'
St Mirren have been directly affected by the postponements after their fixture against Celtic on Wednesday was pushed back, and their chief executive Tony Fitzpatrick has warned Scottish football not to "shoot itself in the foot".
St Mirren experienced a scare ahead of the start of the season when it appeared that seven members of their staff had tested positive for the coronavirus, before a re-examination found that just one coach was suffering from the illness.
"We've learned at first hand within our club the importance of the testing regimen and 100% adherence to all social distancing and hygiene protocols," Fitzpatrick said.
"It is bitterly disappointing that our game tomorrow has been postponed, but it underlines the hugely damaging consequences of even one player disregarding the new rules. We absolutely support the stance of the SFA and the SPFL in this matter.
"These necessary steps are there to protect our game, our players and the very future of every single club in the country.
"The stakes could not be higher and that is why as a club we will be constantly reinforcing the need for personal responsibility and vigilance. The Scottish game simply cannot afford to shoot itself in the foot."
Fixture pile-up for Celtic?
Sky Sports News' Charles Paterson:
"This creates a major fixture pile-up for Celtic.
"With these two games postponed, their next scheduled game is the Champions League qualifier next weekend against KR Reykjavik, and there has to be a question mark over that. UEFA will need to make a decision over that, and the Scottish government might have something to say about that too.
"The next scheduled SPFL game is August 22, with Celtic going to Dundee United. By then, they could be some way behind Rangers and other teams in the Premiership, so this is a major headache for Neil Lennon and for Celtic.
"But I think this is an embarrassment, more than anything, for Celtic at the moment."