Owen Williams kicked a conversion with 92 minutes on the clock to give Ospreys a remarkable 27-26 win over Leicester.
A round-up of Sunday's Heineken Champions Cup action as Edinburgh booked a last-16 place after victory at Castres, while Stormers and Racing 92 won.
La Rochelle broke Ulster hearts in the very final play to book a last-16 spot, while Ospreys, Saracens, Sharks and Bulls won too.
Munster held on to beat Northampton Saints 27-23 in a nail-biting second half in the European Cup, despite Jack O'Donoghue's early red card.
Leinster and Toulouse book Champions Cup last-16 places after wins at Gloucester and Sale
A Gavin Coombes double, and an immense second-half defensive performance, saw Munster secure a fiery 17-6 win over Northampton Saints.
Harlequins avenged their harrowing home defeat by Racing 92 two years ago by dispatching the French heavyweights 14-10 in their Heineken Champions Cup clash.
Antoine Hastoy scored 26 points as La Rochelle made it two wins from two in the Champions Cup, holding firm to beat Ulster 36-29 in Dublin.
Leicester Tigers claimed a second Champions Cup win from as many rounds, beating Clermont, while Saracens dug deep to win at Lyon.
Recap Saturday's early Champions Cup Round 2 clashes, as Exeter proved too strong for the Bulls, while Edinburgh beat Castres.
Leinster cruised to a dominant victory over a depleted Gloucester in the Heineken Champions Cup, while Sharks narrowly beat Bordeaux to continue their strong start...
Toulouse began their 2022/23 Champions Cup campaign in ideal fashion, with an 18-13 victory over Munster at Thomond Park.
Steve Borthwick says his focus is on Leicester's next Champions Cup game as speculation continues to rage about him becoming new England coach.
Harlequins fell to defeat at South African side Sharks in their opening Heineken Champions Cup game as Leinster and Gloucester started with victories.
Sale began their Heineken Champions Cup campaign with an emphatic win over Ulster, while Saracens turned things around to beat Edinburgh.
The dismissal of hooker Agustin Creevy cost London Irish as they suffered a 32-27 loss to Montpellier in their Champions Cup opener.
South African teams will play in the Champions Cup for the first time next season.
A dramatic final-minute try by Arthur Retiere secured La Rochelle a first European Cup triumph, as they beat Leinster 24-21.
La Rochelle's Ronan O'Gara has termed his side's Champions Cup success vs Leinster as "surreal"; Johnny Sexton called the loss "devastating".
Recap all the updates from Saturday's Heineken Champions Cup final as La Rochelle beat Leinster in Marseille.