Leinster head coach Leo Cullen has given positive updates on Sean O'Brien, Robbie Henshaw and Jonathan Sexton ahead of the PRO12 campaign.
O'Brien and Henshaw are "making good progress" and Sexton is "a couple of weeks away" from making a return to rugby, said the boss.
Leinster kick off their PRO12 season with a home game against Treviso on Friday, with Cullen providing an update on his Irish Test trio.
"Johnny is making good progress. He's a couple of weeks away, probably," he told Leinster's official website on Monday.
"Robbie and Sean, post their surgeries – Robbie had his operation after the (Ireland) tour – they're making good progress. You're probably looking at six weeks with Robbie. Seanie had his surgery at the end of the last season. It was probably the most major of the surgeries out of the three of them. He's probably on a similar timeline to Robbie at the moment."
Asked whether Henshaw and O'Brien would be available for the start of Leinster's Champions Cup campaign at home to Castres Olympique on October 15, Cullen said he was "hopeful" that the duo would be fit.
"We'll see what's best for them. We're just making sure they get back correctly and we're not putting them at risk. They're making really good progress the two of them. You would hope to have them available, but if they're not right, they're not right," he said.
He added on Cian Healy, Rob Kearney and Mike McCarthy's fitness after a recent pre-season outing: "Those guys came through well. Rob played at the end of the season, but he pulled out of the tour. He's looking really sharp in training. It was great to get through 40 minutes. Those guys are up and running, so there's three pretty experienced guys back now."