Wales have fitness concerns over Ben Davies and Ethan Ampadu ahead of Euro 2020 with both defenders set to miss the rest of the club season.
Ampadu, 20, who can play in defence or midfield, has not featured in Sheffield United's last two matchday squads because of a pelvic problem.
Wales begin their Euro 2020 campaign against Switzerland in Baku on 12 June.
Caretaker boss Rob Page had said Davies was expected to be fit for Wales' campaign, but Tottenham's interim head coach Ryan Mason says the former Swansea City player is a doubt.
"It's too early to make a decision on the Euros, but I am sure Ben feels confident within that," Mason said.