Chelsea striker Alvaro Morata was left out of Spain’s World Cup squad, announced today.Morata paid the price for a disappointing debut season in the Premier League as Spain coach Julen Lopetegui picked Iago Aspas and Rodrigo Moreno up front, along with Atletico Madrid’s Diego Costa.“The decision is always difficult because of the talent of the players we have,” Lopetegui said.READ | Radja Nainggolan left out of Belgium’s 2018 FIFA World Cup squad“We have opted for three other players who had different assets and including four players up front was not something we wanted to do.” Two more Chelsea players also missed out as Marcos Alonso and Cesc Fabregas were not included in the 23-man group.Morata’s absence was the stand-out decision, however, even if it was not an entirely surprising one given the 25-year-old’s dramatic dip in form.After scoring seven goals in his first seven games for Chelsea, a back injury seemed to affect his confidence. Morata has scored only three times in 22 games since the turn of the year.“I’ve talked to the players I had to talk to,” Lopetegui said. “I’m not going to name anybody, but there are players who had to find out from me that they were not going to be on the list.”READ | Maurizio Sarri undecided if he will remain at Napoli amid Chelsea linksIn contrast, Aspas and Moreno have been in excellent form for Celta Vigo and Valencia respectively, with Aspas the top Spanish scorer in La Liga on 22 goals.Costa is expected to start when Spain open up against Portugal in Group B on June 15 but Aspas, with his speed and direct running, remains an attractive option.Alonso only made his debut in a friendly against Argentina in March and lost out to Arsenal’s Nacho Monreal. Fabregas fell behind Spain’s impressive wealth of options in midfield, which will include Sergio Busquets, Saul Niguez, Koke, Thiago Alcantara, Andres Iniesta, David Silva, Isco, Marco Asensio and Lucas Vazquez. Manchester United’s David de Gea was included as expected, along with fellow goalkeepers Pepe Reina and Kepa Arrizabalaga.Chelsa defender Cesar Azpilicueta did make it in, as did Monreal. Dani Carvajal, Alvaro Odriozola, Gerard Pique, Sergio Ramos, Nacho and Jordi Alba complete Spain’s group of defenders.“I’ve had several doubts, making a list of 23 is very difficult,” Lopetegui said. “But we have decided this was the most balanced decision and the one we think will help us most at the World Cup.”READ | Iran announces 2018 FIFA World Cup squad without striker Kaveh RezaeiSquad:Goalkeepers: David de Gea (Manchester United), Pepe Reina (Napoli), Kepa Arrizabalaga (Athletic Bilbao).Defenders: Jordi Alba (Barcelona), Nacho Monreal (Arsenal), Alvaro Odriozola (Real Sociedad), Nacho Fernandez (Real Madrid), Dani Carvajal (Real Madrid), Gerard Pique (Barcelona), Sergio Ramos (Real Madrid), Cesar Azpilicueta (Chelsea).Midfielders: Sergio Busquets (Barcelona), Isco (Real Madrid), Thiago Alcantara (Bayern Munich), David Silva (Manchester City), Andres Iniesta (Barcelona), Saul Niguez (Atletico Madrid), Koke (Atletico Madrid).Forwards: Marco Asensio (Real Madrid), Iago Aspas (Celta Vigo), Diego Costa (Atletico Madrid), Rodrigo Moreno (Valencia), Lucas Vazquez (Real Madrid).