Ireland captain Caelan Doris’ availability for the British and Irish Lions tour to Australia is in doubt as Leinster say he will have a “procedure” on a shoulder injury.

The 27-year-old, who has been touted as a potential Lions captain after taking over as Ireland skipper before last year, was hurt during Leinster’s Champions Cup semi-final loss to Northampton Saints on Saturday.

Andy Farrell, who appointed Doris as Ireland captain, names his Lions squad on Thursday.

“The full extent of the injury, and implications for the summer, won’t be known until after the procedure,” read a statement from Leinster.

However, speaking to reporters later on Monday, Leinster senior coach Jacques Nienaber says he fears the injury Doris is “quite serious”.

“He saw a specialist and I think there’s some further investigation that needs to be done,” Nienaber said of Doris, who was forced off with a quarter of the Saints game remaining.

“Fingers crossed that things aren’t as bad as we think it is, but in the last couple of months that I’ve worked with Caelan, he’s not a guy that necessarily comes off the pitch with injury.

“So when I subjectively saw him coming off the pitch on Saturday, I thought in my mind, ‘that must be quite serious’.

“We’ll probably know more in the back end of the week, but my gut, and it’s only gut, says that I think it might be serious, but fingers crossed it might not be.”

The Lions take on Argentina in Dublin on 20 June before travelling to Australia. Farrell’s side face the Wallabies in three Tests on 19 July (Brisbane), 26 July (Melbourne) and 2 August (Sydney).