A round-up of Saturday's three quarter-finals which saw Leicester, Ulster and Montpellier complete the semis line-up.
Three law variations covering red card replacements, captain's challenge and goal-line drop-outs will be used in the inaugural Guinness PRO14 Rainbow Cup.
Ulster will play Northampton in the quarter-finals of the Challenge Cup after inflicting a heavy 57-21 defeat over a young Harlequins side on Sunday.
A round-up of Saturday's PRO14 action as Leinster ended Ulster's push for a place in the final, while Dragons and Glasgow also picked up wins.
A clinical display from Ulster ensured they kept the pressure on Leinster thanks to a 19-13 victory over Glasgow.
Wales wing Louis Rees-Zammit is among the Six Nations stars in club action on Friday night as focus shifts back to the Premiership and PRO14.
Andy Farrell has added Tadhg Beirne, Josh van der Flier and fit-again James Lowe to his Ireland squad to face Wales in Cardiff on Sunday.
Team news ahead of the Challenge Cup semi-final between Leicester Tigers and Ulster.
After an inconsistent 2020, will Andy Farrell's Ireland be able to challenge Six Nations favourites France and England in 2021?
Ireland forwards coach Paul O'Connell admits it is a major blow to lose the "X-factor" qualities of Caelan Doris on the eve of the Six Nations.
Fiji international Leone Nakarawa will join Ulster from PRO14 rivals Glasgow Warriors at the end of the season.
Uncapped Munster scrum-half Craig Casey and Ulster tighthead Tom O'Toole have been included in Andy Farrell's Ireland Six Nations squad.
We take a look at where European rugby can go next, after the Champions Cup's temporary suspension was confirmed on Monday.
Defending PRO14 champions Leinster showed their class with a bonus-point win over Ulster at the RDS.
Wasps dominate our team of the week after they dismantled Exeter Chiefs, while Connacht and Bristol provide three players each...
Connacht won in Dublin for the first time since September 2002, while Ulster maintained their 100-per-cent start in the PRO14 by beating Munster.
Team of the week: The standout players from the Premiership, PRO14, Top 14 and Currie Cup combine in our last TOTW for 2020.
Ian Madigan helped himself to 22 points in Ulster's 32-19 Guinness PRO14 derby win over Connacht at the Sportsground.
George Barton came off the bench to snatch victory from the jaws of defeat for Gloucester in a 38-34 win over Ulster.
A brace of tries from Cheslin Kolbe helped Toulouse open their Champions Cup campaign with a rare win in Belfast, beating Ulster 29-22.