The Challenge Cup quarter-final pairings have been confirmed, with the highlight being Clermont Auvergne and Ulster.
Elsewhere, the Sharks are number one seed and will face fellow United Rugby Championship side Edinburgh in the last eight.
The Ospreys, who dispatched Sale Sharks on Saturday, have another Anglo-Welsh showdown next weekend as they take on Gloucester.
Finally, Italian outfit Benetton will host Connacht after the Irish province defeated Pau in the round of 16 of the last Challenge Cup.
Sunday's action
Ulster came from behind to beat 14-a-side Montpellier 40-17 and advance to the last eight of the Challenge Cup.
Tries from Paul Willemse and Orban Aymery put Montpellier into the lead and the visitors went into the half-time break 17-7, but Will Addison got back into the game with a touchdown just before the half-hour mark.
The big turning point came just after half-time, when try scorer Willemse was given a red for a high tackle on Addison. Ulster made use of extra players with the likes of Robert Balcoon, Scott Wilson, David McCann and Stuart McCloskey all set up a quarter-final encounter with Clermont.
Meanwhile, the Sharks scored seven tries in a comfortable 47-3 win over Zebre at Kings Park Stadium.
Tiff Eden scored a penalty to give the Italian team an early lead, but they could not add to the score, which was a good one.
Vincent Sitka flew over the whitewash for the first try of the game, and Werner Koch and Corn Lahr scored two more goals to give the Sharks a commanding lead at halftime.
They showed no mercy after the break and won with tries from Afelele Fassi, Fepsi Buthelezi, Ethan Hooker and Kerwin Bosch.
Edinburgh and Ospreys named winners as home side continue to win Challenge Cup
In Sunday's final match, Connacht secured an impressive victory over Pau, with two Irish teams progressing into the last eight.
It was a thrilling try-studded game, with Sasha Zegur and Dave Heffernan exchanging tries, scoring twice in the first 10 minutes.
Cian Prendergast then replaced the visitors, but Zegur's second try and Joe Simmons' two penalties gave the French a 20-12 lead at the interval.
Shane Bolton, replacing Connacht, responded in the second period, but Siegfried Fijihoi touched down and Simmons added a drop goal to extend the buffer to 11 points.
It looked like a long way to go for the visitors, but goals from Kaolin Blade, Bundy Aki and Prendergast gave the Irish a fantastic victory.
Challenge Cup Quarterfinal Draw
Gloucester (2) vs Ospreys (7) Friday 12th April 20:00 BST
Sharks (1) v Edinburgh (8) Saturday 13th April, 13:30 local time (12:30 BST)
Clermont Auvergne (4) v Ulster (12) Saturday 13th April, 13:30 local time (12:30 BST)
Benetton (3) v Connacht (11) Sunday 14th April, 13:30 local time (12:30 BST)
read more: Gloucester overcame late scare against Castres to book their place in the Challenge Cup quarter-finals
