Ronny Deila lamented the referee for sending-off defender Virgil van Dijk in the first-half after his side exited the Europa League following a 1-0 defeat at Inter Milan.
Celtic were beaten 1-0 by Inter Milan in the last-32 Europa League clash at the San Siro to exit the competition 4-3 on aggregate.
Celtic boss Ronny Deila has urged the "one per cent" of troublesome supporters to behave following the club's latest fine from UEFA.
Celtic boss Ronny Deila has challenged his team to make history when they take on Inter Milan at the San Siro on Thursday evening.
Celtic defender Jason Denayer is expected to start in the Europa League last-32 clash against Inter Milan on Thursday.
The Scottish Professional Football League is to review its policy on fan behaviour in the wake of criticism over its stance on sectarian singing.
Celtic have been fined 10,000 euros (£7,300) by UEFA following crowd disturbances during their Europa League tie against Dinamo Zagreb in Croatia.