Ireland international Garry Ringrose has been sidelined for up to five months after undergoing a surgery on his shoulder last week.
The Leinster centre featured in all three games of Ireland's June internationals and scored a try each in the two Tests against Japan. The 22-year-old also crossed over seven times in his 17 starts for his his Pro 12 side last season.
The news was confirmed by a statement released by Leinster.
"Leinster Rugby can confirm that Garry Ringrose underwent an operation last Monday," read the statement from the Pro 12 club.
"The operation to address an ongoing shoulder issue was successful but Ringrose will be out for four to five months, depending on his rehabilitation."
Meanwhile, Ringrose's Ireland and Leinster team-mate Robbie Henshaw has also been ruled out for 16 weeks after suffering a pectoral muscle tear while representing British and Irish Lions in the tour game against Hurricanes.