Madrid - Spain manager Vicente del Bosque on Sunday put off until at least May 31 naming his full World Cup squad to monitor the fitness of key Real Madrid and Atletico Madrid players.
Del Bosque announced a list of 19 players for the World Cup holders' friendly against Bolivia on May 30 and said he would name the final World Cup squad of 23 the day after that. He has until June 2 to finalise the list.
"We want to be sure that they will be in perfect physical condition to play in the World Cup," Del Bosque told a news conference.
"We hope that on June 2 all those who are going to play in the World Cup will be able to train."
Barcelona winger Gerard Deulofeu won a call-up for the Bolivia match despite not being on the 30-strong long-list already announced for next month's World Cup in Brazil.
Sunday's list left out for the time being players from the two Spanish teams in Saturday night's Champions League final in which Real Madrid beat their city rivals Atletico 4-1 in extra time.
They include Real Madrid goalkeeper Iker Casillas and defender Sergio Ramos, a hero of the Lisbon final after his 93rd-minute equaliser sent the match into extra time before Real scored three more.
Midfielder Xabi Alonso and defender Dani Carvajal are the two other Real players concerned.
Among the others are Spain's Brazilian-born striker Diego Costa, who started for Atletico in Lisbon on Saturday night but was replaced after nine minutes due to an ongoing hamstring injury.
Costa had surprisingly been passed fit to start the Champions final after reportedly undergoing a special horse placenta treatment in Serbia earlier in the week.
Also among those waiting to confirm his place on the plane to Brazil is his Atletico teammate Juanfran Torres, who finished Saturday's match with an ankle injury, and two other Atletico players, Koke and striker David Villa.
Del Bosque omitted from his list of 19 the Manchester City striker Alvaro Negredo and Juventus's Fernando Llorente, raising hope for Chelsea's Fernando Torres who made it into the squad to face Bolivia.
Manchester United's Juan Mata and Negredo's City teammate David Silva also made Sunday's list, but a third Manchester City player, forward Jesus Navas, must wait until after the Bolivia match.
"No one is ruled out," except the already injured Bayern Munich midfielder Thiago Alcantara, Del Bosque said.
Excluding Deulofeu, Del Bosque will add to the list of 18 the eight Real Madrid and Atletico players and will then have to eliminate three names for a final list of 23.
Spain face Chile, the Netherlands and Australia in World Cup Group B. Their first match pits them on June 13 against the Netherlands -- their opponents in their 2010 World Cup final triumph.
Full Spain squad for May 31 friendly against Bolivia:
Goalkeepers: Pepe Reina (Napoli/ITA), David de Gea (Manchester United/ENG)
Defenders: Jordi Alba, Gerard Pique (Barcelona), Cesar Azpilicueta (Chelsea/ENG), Javi Martinez (Bayern Munich/GER), Raul Albiol (Napoli/ITA), Alberto Moreno (Sevilla)
Midfielders: Sergio Busquets, Xavi Hernandez, Andres Iniesta, Cesc Fabregas (all Barcelona), Santi Cazorla (Arsenal), Ander Iturraspe (Athletic Bilbao), Juan Mata (Manchester United/ENG)
Forwards: David Silva (Manchester City/ENG), Pedro Rodriguez (Barcelona), Fernando Torres (Chelsea/ENG)
In squad for Bolivia match but not for World Cup: Gerard Deulofeu (Barcelona)