Connacht and Leinster are both in action today in the Heineken Cup after Ulster secured a quarter-final spot last night with a 23-6 win over Glasgow.
The western province will be first in action as they go in pursuit of a place in the knock-out stages of the Amlin Challenge Cup.
They will be without out-half Dan Parks as they visit the Stoop to challenge runaway Pool 3 leaders Harlequins from 1.35pm.
Leinster are involved in a 6pm game this evening at the RDS as the defending champions attempt to salvage their title ambitions.
The European champions are chasing a bonus-point victory against the Scarlets, but Ireland captain Brian O'Driscoll will start the game on the bench.
Full-back Rob Kearney says that the key is to focus on playing their own game...
©INPHO/Donall Farmer