Leinster flanker Sean O’Brien is set to return after a lengthy injury spell which saw him miss out on three of Ireland's Six Nations matches.
The 29-year-old, who made his debut for the Irish province in 2008, sustained a hamstring injury while on duty for Ireland against France at the Stade de France in February.
He has not played for Leinster since their 25-11 Champions Cup win over Bath on January 16.
Leinster assistant coach Girvan Dempsey is positive that the powerful back-row will make his return when they travel to face Ulster at Kingspan on Saturday.
"It’ll depend on how he goes in the first two days this week," Dempsey told The42.ie
"It’s important that he got through some running last week.
"We’re hoping we can push that on this week and we’ll assess him later in the week to see how he is for the weekend.
"If he gets through the workload, the volume of training we have, then he’llbe in the mix. We had always targeted this period to return.
"His progress has been spot-on, he’s been hitting most of his markers so it’ll really just be about seeing how he deals with the added volume of a team session."