James Ryan took a knock to his shoulder after coming on as a replacement to make his competitive debut for Leinster in their 39-16 victory over the Dragons at Rodney Parade. His fitness will be assessed ahead of Friday night's game against the Cardiff Blues at the RDS.
Jordi Murphy was due to start last weekend but was withdrawn after taking a knock to his knee and along with Fergus McFadden (calf), Dave Kearney (groin) and Joey Carbery (calf) must all prove their fitness in training this week to be considered for selection.
Jamie Heaslip (lower back) made a graduated return to practice last week while hooker Richardt Strauss' recovery from a knee procedure has been slower than anticipated and will only resume light work this week.
Scrumhalf Luke McGrath and flanker Rhys Ruddock, both of whom toured with Ireland during the summer, will be available for the Cardiff match on Friday.
