The venues for this season's Heineken Cup semi-finals have been confirmed by European Rugby Cup.
The first tie will be staged at the Stade de la Mosson in Montpellier on Saturday, 27 April, and will feature the winners of the weekend quarter-final between Clermont Auvergne and Montpellier against the victor of Harlequins v Munster clash.
The 32,000-capacity ground is the home of the city's Ligue 1 football club and this will mark the first time it has staged a Heineken Cup knockout match, although it was used for Montpellier's pool stage clash with Leinster last season.
The second semi-final will be held at either Twickenham or the Aviva Stadium on Sunday, April 28.
The venue will be determined by the winner of the Saracens v Ulster last-eight meeting, with the winners facing Toulon or Leicester.