At the end of another week of crisis, Saracens had rare cause for cheer as they reached the quarter-finals of the European Champions Cup.
A thrashing of Lyon ensured Leinster made it five wins from five in the European Champions Cup, while Racing 92 reached the last eight.
Pro14's Conference A leaders Leinster dismantled second-placed Ulster on Friday, scoring eight times before the beaten visitors rallied.
Lyon are reportedly targeting Ireland fly-half Johnny Sexton, but Leinster insist there has been no suggestion he will leave the province.
Leinster head coach Leo Cullen is unsure how long fly-half Johnny Sexton will be out of action.
There were seven tries in Leinster's 43-16 European Champions Cup win over Northampton Saints as they made it 10 victories from 10.
Ospreys were no match for Saracens on Saturday, while Exeter Chiefs were among the other European Champions Cup winners.
Andrew Porter and Ronan Kelleher each crossed twice as Leinster maintained their 100 per cent record, while Edinburgh beat Dragons.
Undefeated Leinster made light work of the Dragons as Glasgow Warriors thrashed Southern Kings 50-0 on Friday.
Friday's Pro14 fixtures saw a trio of easy victories as the Cheetahs, Leinster and Connacht all won by big margins.
Leinster's 21-year-old hooker Ronan Kelleher ran in a hat-trick in their thrashing of the Ospreys, while the Scarlets saw held off Glasgow.
Ireland's most decorated player, Rob Kearney, is sure of playing his 15th professional season in his home country.
Sean O'Brien, who will join London Irish later this year, is to miss the Rugby World Cup for Ireland with a hip injury.
Leinster failed to read the script as Stuart Hogg's final Glasgow Warriors match ended in a painful Pro14 final defeat.
Cian Healy says he is "part of something bigger than just a rugby team" representing Leinster and Ireland.
Munster gave it a great go, but Leinster have the chance to be crowned Pro14 champions once again.