British and Irish Lions head coach Ian McGeechan admitted it could be two weeks before he names a replacement for scrum-half Tomas O'Leary.
O'Leary has been ruled out of the summer tour to South Africa after breaking his ankle during Munster's Magners League victory over the Scarlets last night.
But with the Heineken Cup and Guinness Premiership semi-finals to come, McGeechan is no hurry to decide who will be added to the squad.
"I won't rush in naming a replacement. It was a phone call I didn't want last night," he said.
"I'm obviously desperately disappointed for the player but we'll take our time and keep our eye on things.
"I'm not looking to name a replacement for 10 to 14 days. There's some rugby to watch and I'll take my time."
Grand Slam winner O'Leary started four of Ireland's RBS 6 Nations matches and was selected alongside fellow scrum-halves Mike Phillips and Harry Ellis for the Lions tour.
Possible replacements will include Scotland captain Mike Blair, his national squad colleague Chris Cusiter, Wales' Dwayne Peel and England international Danny Care.