Munster and Leinster will both be involved in the last 8.
Munster's Heineken Champions Cup quarter-final against holders Toulouse will have a 3pm kick-off at the Aviva Stadium on Saturday, May 7th.
Leinster's trip to Premiership leaders Leicester will be played on the same day, with a 5.30pm start at Welford Road.
Ronan O'Gara's La Rochelle take on Montpellier in an all-French encounter at the same time at Stade Marcel-Deflandre.
The other last-eight tie will be played on Sunday the 8th of May, where Racing 92 host Sale Sharks at 3pm Irish time.

IRFU Investigate Online Racist Abuse Directed Toward Edwin Edogbo
Farrell Hits Out At "Keyboard Warriors" Aiming Abuse At Suncroft's Sam Prendergast And Jack Crowley
Monday Morning Sports Update
Kildare Football Team vs Derry
Tottenham Set To Appoint Igor Tudor As Interim Head Coach
Two League Of Ireland Games Postponed Due To Weather Conditions
ROI Begin Their National League Campaign Away To Kosovo On September 24th
Friday Morning Sports Update