Harlequins Rugby have confirmed the game will be played at their home grounds, the Twickenham Stoop.
If Munster were to win in London they would face the winners of the Clermont v Montpellier clash in France on the weekend of April 26/27/28.
Quarter-Final matches to be played on the weekend of April 5/6/7 are:
(1) Harlequins v Munster Rugby (8)
(2) ASM Clermont Auvergne v Montpellier (7)
(3) Toulon v Leicester Tigers (6)
(4) Saracens v Ulster Rugby (5)
Semi-Final matches to be played on the weekend of April 26/27/28 are:
The winner of the first named quarter-final in each semi-final pairing will have home country advantage.
Semi-final 1: Saracens or Ulster Rugby v Toulon or Leicester Tigers
Semi-final 2: ASM Clermont Auvergne or Montpellier v Harlequins or Munster Rugby