Sunderland defender Niall Huggins is set to miss the second half of the season as he requires surgery on a "significant" knee injury.
Huggins, 23, picked up the injury in the 3-0 defeat to Coventry City last Saturday when he landed awkwardly.
The full-back has played 20 times this season, scoring once.
He was selected in the Wales squad for the first time in November but was an unused substitute in both Euro 2024 qualifiers against Armenia and Turkey.
Sunderland say there is currently "no specific timescale" for his return, meaning he will miss Wales' Euro 2024 play-off against Finland in March and possibly the European Championships next summer, if they were to qualify.