Former Scotland rugby captain Stuart Hogg has been arrested and charged with stalking and breaching bail conditions.
Exeter progressed to the European Cup quarter-finals in dramatic circumstances, while Saracens and Toulouse also won.
Edinburgh had to settle for a Heineken Champions Cup last-16 away tie at Leicester despite beating Saracens 20-14.
La Rochelle broke Ulster hearts in the very final play to book a last-16 spot, while Ospreys, Saracens, Sharks and Bulls won too.
The dismissal of hooker Agustin Creevy cost London Irish as they suffered a 32-27 loss to Montpellier in their Champions Cup opener.
Leinster and La Rochelle joined Toulouse in the European Champions Cup semi-finals with wins over Leicester Tigers and Montpellier respectively.
Marcus Smith suffered missed conversion misery as Harlequins fell short despite beating Champions Cup opponents Montpellier 33-20.
Zach Mercer gave Eddie Jones a reminder of his outstanding talent as he scored two tries to steer Montpellier to a 40-26 win over Harlequins.
A round-up of the latest Heineken Champions Cup round four pool stage action as April's round of 16 picture is decided.
Leinster got their Heineken Champions Cup campaign back on track as they produced an 89-7 annihilation of Montpellier in Dublin.
Recap the updates as Ulster won at Northampton Saints in the Heineken Champions Cup pool stage, after Leinster dismantled Montpellier.
We look at where things stand ahead of the Heineken Champions Cup's Round 3 pool stage fixtures after heavy Round 2 disruption.
A look ahead to Friday as Ulster host Northampton, while the game between Covid-hit pair Leinster and Montpellier is cancelled.
Montpellier have reported a fifth positive Covid-19 test ahead of their Heineken Champions Cup game against Leinster.
A round-up of the rest of Saturday's European action, which included wins for reigning champions Toulouse and Leinster.
We look ahead to Saturday's five Heineken Champions Cup games as Europe's top competition kicks off for another year.
Leinster say that "an additional number of senior players" have tested positive for Covid-19 ahead of Friday's scheduled game against Montpellier in France.
France's Fabien Galthie has named nine uncapped players in his 42-man squad for next month's Tests vs Argentina, Georgia and New Zealand.
Defending European Cup champions Toulouse will begin their title defence in Cardiff, in a repeat of the inaugural 1996 final.
Defending European Cup winners Toulouse will face Wasps and Cardiff in 2021/22; Premiership champions Harlequins will play Castres and Cardiff.