Celtic's home Champions League tie will go ahead next week despite a Covid-19 issue which has seen two league games called off.
But Bhoys manager Neil Lennon has blasted Belgian defender Boli Bolingoli after his unauthorised trip to Spain has brought chaos to the Scottish league.
And Dundalk's Champions League opponents, NK Celje, also have cause for concern as an outbreak of Covid-19 among four clubs in Slovenia has led to the postponement of the league's start next week.
It emerged that Bolingoli travelled to Spain, in breach of regulations around travel and quarantine to visit family.
And the Scottish FA reacted quickly by calling off tonight's SPL game against St Mirren and Saturday's clash with Aberdeen. Celtic now go into Tuesday's one-off tie at home to KR Reykjavik lacking match practice.
The threat from the presence of Covid-19 in a squad was underlined in the last 24 hours when Linfield were given a bye into the first round of the Champions League after their Kosovan opponents were removed from the competition after a player tested positive.
Fears that UEFA could halt Celtic's tie at home to KR were eased when UEFA confirmed the tie would go ahead. But Lennon didn't hold back when he spoke about Bolingoli.
"This is a rogue who has gone off tangent and decided to do something very, very selfish," Lennon said. "We were livid and appalled."