Wales boss John Toshack is expected to field a strong side in Sunday's friendly against the Basque National side in Bilbao's San Mames Stadium.
Toshack, who used to manage Real Sociedad in the Basque country, is well aware of the high quality of qualified players available from La Liga for a game that is expected to be a 40,000 sell-out.
The Basques are rarely able to play as a nation and have lost just once in 13 games in 13 years.
Wales are without Jason Koumas for personal reasons, while Sam Ricketts and Owain Tudur Jones are involved in Swansea's play-off final.
Cardiff's Paul Parry did not make the flight due to problems with his injured knee but David Cotterill trained fully today and has recovered from an ankle injury.
Provisional team: P Jones (QPR), Duffy (Portsmouth), Gabbidon, Collins (both West Ham), Nyatanga (Derby), Ledley (Cardiff), Robinson (Norwich), Fletcher (West Ham), Davies (Everton), Giggs (Man Utd), Bellamy (Blackburn). Substitutes: Price (Ipswich), Partridge, Cotterill (both Bristol C), Earnshaw (Norwich), Vaughan (Crewe), Morgan (MK Dons), C Davies (Verona), Bale (Southampton).