The times and dates for the Heineken Cup quarter-finals have been announced with Ulster facing Saracens on Saturday 6 April and Munster facing Harlequins the following day.
The kick-off time for the Ulstermen's clash with Sarries is 18:30, with a venue yet to be confirmed. The English Premiership side are hoping to play the match at their new home Allianz Park.
Munster will travel to The Stoop to face Harlequins at 14:00 on 7 April.
In the other two quarters, Clermont Auvergne will face Montpellier on 6 April at Stade Marcel Michelin, kick-off 16:40.
And Toulon will meet Leicester Tigers at 17:30 on 7 April. A venue for that clash has yet to be confirmed.
AMLIN CHALLENGE CUP
Meanwhile, Leinster's Amlin Challenge Cup quarter-final against Wasps has been confirmed for Adams Park on Friday 5 April, kick-off 20:00.
HEINEKEN CUP QUARTER-FINALS
Saturday 6 April
ASM Clermont Auvergne v Montpellier, Stade Marcel Michelin - kick-off 16:40
Saracens v Ulster, venue TBC - kick-off 18.30
Sunday 7 April
Harlequins v Munster, Twickenham Stoop - kick-off 14:00
Toulon v Leicester Tigers, venue TBC - kick-off 17:30
AMLIN CUP QUARTER-FINAL
Friday 5 April
London Wasps v Leinster, Adams Park - kick-off 20:00