Ulster secure a bonus-point 52-24 win over Harlequins to stay in contention for a place in the European Champions Cup quarter-finals.
Harlequins second row Stan South extends his contract with the Premiership club.
Ulster revive their European Champions Cup prospects with a deserved 17-5 win which ends any chance Harlequins had of reaching the last eight.
Saracens lose their fifth consecutive match as Tim Visser's late try gives Harlequins a 20-19 victory at The Stoop.
Audio & Video
Ugo Monye explains why England winger Marland Yarde is set to join Sale Sharks from Harlequins.
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What's on BBC Sport this week
This week's sport on the BBC includes the third Test of the Ashes series, Bobsleigh and Skeleton World Cup, Premier League football and Sports Personality of the Year.