Holders Saracens squeezed into the quarter-finals of the European Champions Cup as they were done a favour by Premiership rivals Wasps.
Saracens won a second successive European title last season with victory over Clermont Auvergne in the final.
Despite a 62-14 win over Northampton Saints on Saturday, Saracens were in danger of being eliminated having only managed to finish second behind Clermont in Pool 2.
But Ulster's 26-7 defeat to Wasps secured Saracens' place in the last eight, their domestic rivals keeping their own slim hopes of qualification alive thanks to tries from Guy Thompson, Tom Cruse, Willie Le Roux and Jake Cooper-Woolley.
Saracens progress as one of the three best runners-up but will hope for much more consistent performances in the knockout rounds.
Wasps will be eliminated if Munster can beat Castres later on Sunday.
Thanks to yesterday's 62-14 win over @SaintsRugby and today's results, Saracens will take their place in the Quarter-Finals of the @ChampionsCup to continue the defence of their title, get in there!!!-- Saracens Rugby Club (@Saracens) January 21, 2018
Fixture details to follow...