Nick David scores a hat-trick to help Harlequins book their spot in the Investec Champions Cup last 16 by thrashing a much-changed Stormers side.

Munster will need a result against Castres at home next weekend to progress in the Champions Cup after falling to a late defeat by Toulon at the Stade Mayol on Sunday.

Ospreys qualify for the Challenge Cup knockout stages despite a 23-19 defeat to Zebre.

Ulster's European Challenge Cup match with the Cheetahs in the Netherlandsis called off due to an unplayable pitch less than an hour before kick-off.

Investec Champions Cup team news and line-ups for Sunday's matches involving Harlequins, Northampton and Saracens.

Clovers climbed to third in the Celtic Challenge after a hard-fought win over Brython Thunder at the Cardiff Arms Park.

Fly-half Billy Searle scores a second-half hat-trick as Leicester Tigers keep their knockout hopes alive in the Investec Champions Cup with a dominant win over Bayonne.

Harry Byrne scores a match-winning penalty with the last kick of the game as Leinster move closer to securing a home last-16 game in the Investec Champions Cup with a nail-biting win over rivals La Rochelle at Aviva Stadium.

Bristol Bears qualify for the Champions Cup knockout stage by winning an astonishing 16-try contest with the Bulls in Pretoria.

Glasgow Warriors book a spot in the last 16 of the Champions Cup with an outstanding bonus-point at Clermont Auvergne.

A much-improved second-half performance helps Sale beat South African side the Sharks and confirms their passage to the Investec Champions Cup last 16.