Celtic have been knocked out of the Champions League, losing 1-0 to Maribor in the second leg of their play-off
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Celtic are facing the prospect of missing out on qualifying for the UEFA Champions League group stages after a heavy defeat in their third qualifying round first-leg encounter against Legia Warsaw.
Ronny Deila's 10-man side fell to a 4-1 defeat in the Polish capital, although the match started brightly for the Hoops when Callum McGregor scored the opening goal of the game in the eighth minute.
Miroslav Radovic equalised for the hosts two minutes later and then put his side in front with nine minutes of the first half remaining before Efe Ambrose was sent off just before the interval.
Radovic then turned provider, teeing up Michal Zyro, who slotted home with six minutes of the game left and Jakub Kosecki then found the back of the net in added time to really rub salt in their opponents' wounds.
Roy Keane has "asked not to be considered" for the vacant managerial position at Scottish champions Celtic.
The Republic of Ireland assistant manager has ruled himself out of the running to replace Neil Lennon, preferring to continue his work alongside Martin O'Neill.
Dermot Desmond, the Hoops majority shareholder, held talks with the former Manchester United skipper last week but it is understood the discussions did not get as far as a formal job offer.
A source close to the club told Press Association Sport: "Roy was not offered the job - no-one has been offered it yet.
"But he has ruled himself out and asked not to be considered for the position."
Celtic chief executive Peter Lawwell has confirmed the club are interested in appointing Roy Keane as their new boss.
But the Hoops chief says the Republic of Ireland assistant manager faces competition from as many as nine other rivals to be named Neil Lennon's successor.