Saracens hooker Jamie George has revealed he is aiming to overtake skipper Dylan Hartley as England's first choice hooker.
Ireland internationals Rob Kearney and Jamie Heaslip will be absent for Leinster for "a number of weeks".
Ulster continued their push for the PRO12 play-offs with a late rally to secure a 27-17 win over Newport Gwent Dragons.
Winger Blaine Scully will captain the Blues as they head to Dublin on Saturday to take on Leinster, live on Sky Sports 2 from 2.45pm.
David Horowitz scored a try in the final minute to give the Waratahs a thrilling 32-25 win over the Rebels in Melbourne.
Bristol's hopes of Aviva Premiership survival are hanging by a thread after defeat to west country rivals Gloucester.
Rhys Patchell scored 16 points, including two tries, as Scarlets registered a 26-10 bonus-point victory over Edinburgh.
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We've a host of top class rugby union action
Sir Ian McGeechan has backed former Wales captain Sam Warburton to lead the Lions in New Zealand in June.
Ireland and the Hurricanes lead the way after their impressive victories on Saturday, with seven teams represented.
Scott Quinnell, Will Greenwood, Rory Lawson and Alan Quinlan select their Lions XVs after the final round of the Six Nations.
Who would you pick in a combined England/New Zealand team?
From the surreal to the sublime, Will Greenwood brings you his favourite moments from the weekend's rugby.
Stuart Barnes on England's defeat in Dublin, his best moments from the Six Nations and Dylan Hartley's Lions chances.
Dewi Morris relives England's last back-to-back Grand Slams and compares the game and team with today's era.
Three England teams and a Super Rugby wardrobe malfunction feature in Will Greenwood's favourite moments this week.
Sean Fitzpatrick has selected the best bone-crunching hits from round four of Super Rugby.
The best five tries from the latest round of Super Rugby, including George Moala's effort against the Crusaders.
Sean Fitzpatrick is back with his favourite bone-crunching hits from round three of Super Rugby.
Three All Blacks make the cut in our tries of the week after another high-scoring round of Super Rugby action.