Leinster Rugby skipper Caelan Doris will undergo a procedure this week on a shoulder injury, the rugby union team said on Monday, making him a doubt for the British & Irish Lions tour to Australia.
The 27-year-old number 8 picked up the injury around the 56th minute of Leinster's European Rugby Champions Cup semifinal loss against Northampton Saints on Saturday.
He is considered a captaincy contender for the British & Irish Lions tour to Australia.
"The full extent of the injury, and implications for the summer, won't be known until after the procedure," Leinster said in a statement.
Ireland coach Andy Farrell is set to announce his squad on Thursday.
The Lions play Argentina in Dublin on 20 June before five warm-up matches in Australia and three tests on 19 July, 26 July and 2 August.
The Lions won their last series in Australia 2-1 in 2013 having lost the 2001 series 2-1.