Connacht are away to Zebre in the Guinness PRO14 this afternoon.
Ultan Dillane will make his 100th appearance for Andy Friend's side when they kick-off in Italy at half-past-2.
At a-quarter-past-5 Leinster will look to maintain their 100% record so far this season when they host Cardiff Blues.
Ross Molony, Ryan Baird and Josh Murphy come into Leo Cullen's side for the tie.
And Ulster entertain the Scarlets from 25-to-8 tonight