Midtjylland will return to haunt Nottingham Forest, a reminder of the chaos which has enveloped the season.
The four-time Danish champions, last season's runners-up, inflicted a devastating blow on Ange Postecoglou in October.
Their 3-2 win at the City Ground in the Europa League group phase damaged the Australian beyond repair, with Forest fans chanting "sacked in the morning" just three weeks into his reign.
This time they arrive in the last 16, with the first leg in Nottingham on 12 March, and will not even face Postecoglou's replacement - with Sean Dyche lasting just 114 days himself.
Current boss, the fourth of the season, Vitor Pereira made six changes as Forest edged past Fenerbahce on Thursday, losing 2-1 at the City Ground to progress 4-2 on aggregate in the play-off round.
He admitted he needed to be mindful of Sunday's trip to Brighton and Forest could be in the Premier League's bottom three if West Ham beat Liverpool on Saturday.
Pereira sidestepped a question about whether the Premier League is the priority over the Europa League but survival is paramount for Forest.
After the first leg against Midtjylland at the City Ground they host Fulham before travelling to Tottenham following the away leg a week later.
It will be a test of Pereira's skills and their squad depth to juggle both competitions late into the season.
If he can do what Postecoglou could not, and beat of Midtjylland, then it could provide the springboard to survival.