Leinster bounced back from their European defeats to beat Ulster 8-3 and cement their place in the PRO12 play-offs.
The five Champions Cup pool games postponed following the Paris terror attacks will take place in January.
Ireland hooker Rory Best has signed a new contract which keeps him at Ulster for the next two years.
Saracens took control of Pool 1 of the European Rugby Champions Cup with an impressive 27-9 win at Ulster on Friday night.
A look back at Saracens' superb bonus-point win over Ulster in the Champions Cup.
Brad Barritt will captain Saracens in his 150th appearance for the club when they take on Ulster on Friday.
All of this weekend's Champions Cup and Challenge Cup games in France have been postponed due to the tragic events in Paris on Friday night.
Losing bonus points on the road could prove crucial as Saracens, Ulster and Toulouse battle it out in Pool 1.
More of the games that matter on Sky Sports
Rugby Union news, direct to your mobile
A Day Pass for only £6.99. No contract
Win in our free to enter competitions section
We've a host of top class rugby union action