Scottish Premiership champions Celtic are among a host of European giants to be knocked out of the Champions League during the third qualifying round, while last season's semi-finalists Ajax needed a late comeback to edge past Greek side PAOK.
Following on from the club's 1-1 draw away to CFR Cluj last week, Neil Lennon's Bhoys suffered the worst possible start as Ciprian Deac broke the deadlock in Glasgow.
James Forrest and Odsonne Edouard were able to hit back and put Celtic back in the driving seat, but Billel Omrani scored either side of Ryan Christie's effort to give Cluj the advantage, while substitute George u021aucudean rounded off the scoring in added time to dump the Scottish champions out of the Champions League.