Champions Cup holders Saracens have been drawn against Toulon while Bath will meet Bristol in the Challenge Cup.
Montpellier produced a bruising display to beat Castres 28-9 and qualify for a TOP14 semi-final against Toulon.
Dan Carter is set to return for Racing 92's Top 14 play-off clash against Toulouse, live on Sky Sports.
Toulon joined Clermont Auvergne in reaching the Top 14 semi-finals on Sunday, as Montpellier and Racing 92 gained home barrage play-offs.
Former Leicester lock Steve Mafi is among seven new recruits signed for next season by Castres.
A new father and some former Super Rugby stars feature in our team of the week along with a World Cup winning fly-half.
Team of the week includes strong semi-finalists and leaders of the pack from the Top 14 and Super Rugby.
Harlequins are looking to extend their unbeaten run as they take on Montpellier in Friday's Challenge Cup action.
Johnny Leota secured a last-gasp bonus point to keep Sale Sharks' Challenge Cup quarter-final hopes alive.
England hopeful Josh Beaumont skippers Sale against Pau while the Dragons welcome back Hallam Amos for the visit of Castres.
Castres came from behind to beat Pau 30-21 in their European Challenge Cup Pool 2 clash at the Stade du Hameau.
Harequins crushed Calvisano, Sale beat Castres, while Brive and Zebre posted easy wins in the European Rugby Challenge Cup.
Jamie Roberts will make his Harlequins debut against Calvisano on Saturday while Conrad Smith is on the bench for Pau.
Sky Sports confirm the dates for the rescheduled Champions Cup and Challenge Cup matches that were postponed last month.
Eleven different teams feature in our team of the week including hat-trick hero Tim Visser and Toulon debutant Ma'a Nonu.
The five Champions Cup pool games postponed following the Paris terror attacks will take place in January.
Scotland lock Richie Gray will leave Castres for Top 14 rivals Toulouse at the end of the season.
World Cup winner Ben Franks could make his London Irish debut in Saturday's Challenge Cup trip to Grenoble.
All of this weekend's Champions Cup and Challenge Cup games in France have been postponed due to the tragic events in Paris on Friday night.
All the team news ahead of Saturday's Challenge Cup matches, including London Irish v Agen and Gloucester v Zebre.