Connacht beat Munster at Thomond Park for only the second time since 1986, while Leinster worked hard to see off Ulster at the RDS Arena.
Recap Saturday and Friday's PRO14 Rainbow Cup from both hemispheres, as Leinster, Scarlets, Bulls, Sharks, Munster and Glasgow post big wins.
In the aftermath of Warren Gatland's 2021 British and Irish Lions squad announcement, we look at the winners and losers from the forwards.
Sam Simmonds, who last played for England in 2018, has been included in a 37-man British and Irish Lions squad to face South Africa.
Leicester Tigers recovered from 11 points down to book a place in the 2021 Challenge Cup final, after a thrilling 33-24 victory over Ulster at Welford Road.
We look through the contenders for the 2021 British and Irish Lions second row positions, and who Warren Gatland might be looking at.
The Rainbow Cup kicked off in fine style as Ulster claimed a dramatic win over Ulster and a young Edinburgh beat Zebre.
Rainbow Cup games between PRO14 clubs and four South African teams have been cancelled, owing to COVID-19 and a lack of permission.
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.
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