Matthew McCombe, 21, disappeared in Amsterdam last Saturday morning.
The Scottish FA says it intends to complete the cup matches in front of supporters.
The Celtic boss says sport is secondary to the human cost of coronavirus.
The SFA and SPFl have taken the decision to cancel all games with immediate effect.
Celtic hold a 1-1 draw from the first leg of their Europa League tie against Copenhagen.
Fraser Forster saved a penalty to ensure the sides are level ahead of next week's decider.
STV Sport's Ronnie Charters brings us the latest from the Danish capital before the Europa League last-32 tie.
The Glasgow clubs will experience VAR for the first time in the Europa League last 32.
Pieros Sotiriou is travelling to sign for Astana instead of facing the Scottish champions.
Celtic edged a 2-1 win against Aberdeen in blustery conditions after a late Kristoffer Ajer strike.
The full-back says he's enjoying his best spell since moving from Kilmarnock.
Friends and former teammmates reveal McNamara is showing signs of improvement after collapse.
Kevin McGuire, 36, also assaulted police officers before Scottish Cup tie last January.
Neil Lennon says offers will come in for the award-winning striker.
Celtic have made more than £24m of profit for the season so far.
Sky Sports conceded there had been errors in the translation of an interview with the Rangers striker.
Celtic striker said there was no other place he could put his foot during clash with Sam Woods.
The former Hibs, Rangers and Celtic player has hung up his boots at the age of 40.
The Celtic striker has scored six goals in his last four league games.
Dean Wright, 31, and Robert Farrell, 32, allegedly killed Liam Hendry after driving at him in a van in Glasgow's Barrowfield last year.