Great Britain winger Ryan Hall sustained a dislocated knee in the defeat to New Zealand on Saturday.
The 31-year-old suffered the knee injury in Great Britain’s 12-8 loss against New Zealand at Eden Park in Auckland on Saturday.
Hall will not be available to play in next weekend’s second test against the Kiwis.
Lions coach Wayne Bennett only selected two wingers in his squad for the tour – Hall and Jermaine McGillvary.
Wigan centre Oliver Gildart, who has played on the wing a couple of times in the past, has already been ruled out for the rest of the tour due to injury.
Zak Hardaker, who has played centre for Great Britain in both games so far, is the man most likely to move to the wing. Back-rowers John Bateman, Josh Jones or Jack Hughes could move to the centres.
Or the Lions could even be tempted to call up a winger to the squad, such as Wales international Regan Grace or English duo Joe Burgess or Josh Charnley.