Biarritz currently sit on top of Pool 4 with 10 points after they claimed maximum points with a 34 - 7 win over Treviso at the Parc des Sports Aguilera on Sunday.
Ulster's 19 - 10 win over Saracens on Friday night sees them in 2nd place with 9 points, David Humphreys' touchline conversion of Rory Best's try sending the English visitors away from Ravenhill without the losing bonus point  - this was vital for Mark McCall's side with Saracens just one point behind Ulster in 3rd place with 8 points. Treviso have yet to get off the mark and Craig Green's side prop up pool 4 although have shown themsevleves capable of scoring tries against some of the big sides.

Ulster travel to Saracens this weekend for what will be a tough match at Vicarage Road. Saracens coach Steve Diamond has described the mouth-watering clash as a "massive game" and his players know that they need to win to keep themselves in contention. Ulster meanwhile will be mindful of the last time they turned over an English side at Ravenhill with the reverse fixture the following week, defeating Leicester
33 - 0 at Ravenhill in January 2004 only to go down 49 - 7 at Welford Road the following week.

Ulster's match against Saracens is this Saturday, 17th December and will be shown live on Sky Sports with radio commentary on BBC Radio Ulster, kick off 1pm