Benetton Treviso's winning run was ended at five matches as Ulster earned a dramatic draw in the Pro14.
Any hopes Toulouse had of snatching top spot in Pool 1 were extinguished as Leinster defeated Wasps to secure a home quarter-final.
Saracens and Racing 92 secured home quarter-finals in the Champions Cup but the hopes of Exeter Chiefs are over after defeat at Munster.
For the second time in two days, a side racked up a century of points in the Challenge Cup as Bristol Bears routed Enisei...
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Northampton scored 17 tries in a record victory as they beat Timisoara Saracens 111-3 to reach the European Challenge Cup quarter-finals.
Both Edinburgh and Glasgow Warriors are through to the European Champions Cup quarter-finals due to the former's 19-10 win over Montpellier.
Cheetahs secured a dramatic 24-17 victory over South African rivals Southern Kings after Luan de Bruin touched down in the 85th minute.
Premiership champions Saracens are through to the last eight of the European Champions Cup after beating Lyon on Sunday.
Ryan Mills' last-gasp drop goal put Worcester Warriors into the last eight of the Challenge Cup for the first time in a decade.
All four Pro14 sides in European Rugby Champions Cup action on Saturday secured victories, three coming against French opposition.
Zebre led at half-time of their European Challenge Cup match at La Rochelle, but the hosts fought back in stunning fashion on Friday.
Joey Carbery, Rory Scannell, Keith Earls and Andrew Conway were among the tries as Munster overpowered Gloucester.
Clermont Auvergne hammered fellow title hopefuls La Rochelle, who had won 10 of their previous 11 matches.
Wasps won for only the second time since September with a fit-again Joe Launchbury back in the side.
Zebre were no match for Pro14 rivals Cheetahs on Sunday as the South African side eased to a bonus-point victory on the road.
Racing 92's win over Toulon will not have made pleasant viewing for France coach Jacques Brunel as Teddy Thomas was injured.