It is safe to say that Brendan Rodgers burned a lot of bridges when he left Celtic in the middle of last season to return to the Premier League by joining Leicester City. But in their bid to win nine in a row, playing more football after Christmas may have given Rangers the advantage - if Rangers fail to qualify.
Record five-time winners Sevilla knew victory in Luxembourg would send them through from Group A and their one-sided win also sealed top spot. The boys wanted to go forward, play forward, run forward. "We relaxed and they started to press, equalising on the first shot on goal", confessed Parolo.
Former Barcelona winger Munir El Haddadi starred with a hat-trick as Sevilla thrashed Dudelange 5-2 to also reach the knockout rounds.
Celtic produced a vintage European away performance at the Stadio Olimpico when Olivier Ntcham scored a 95th-minute goal to earn his side the three points.
"This team keeps setting new boundaries for itself", said ecstatic manager Neil Lennon.
Basle's Fabian Frei scored the victor on the hour mark for the Swiss outfit as they beat visiting Getafe 2-1 to go four points clear in Group C and guarantee a top-two finish.
Griffiths returned to first-team action in July but has not featured since a 3-1 win over Hearts on 25 August.
AZ Alkmaar thrashed Astana 5-0 in Kazakhstan to keep control of the race for second place in Group L behind United, eliminating their hosts and moving four points clear of Partizan.
It also means that their games with Rennes at Celtic Park and against Cluj in Romania will now only decide whether they win the group or not.