David, the Reds’ double Player of the Year, is yet to earn his first senior cap but has been rewarded for his fine displays this season with a call-up to Vicente del Bosque’s squad.
FIFA requires each country to have a minimum of three goalkeepers in their final 23-man parties for the World Cup, meaning De Gea is definitely going to Brazil as Iker Casillas and Pepe Reina are the only other stoppers on the list.
Mata will also be hopeful of playing at the World Cup after an impressive start to his Reds career, though the midfielder’s place won’t be confirmed until Del Bosque's final squad is submitted on or before 2 June.
Spain's provisional 30-man World Cup squad: Casillas, Reina, De Gea, Ramos, Pique, Albiol, Juanfran, Alba, Carvajal, Moreno, Azpilicueta, Martinez, Xavi, Alonso, Iniesta, Koke, Busquets, Cazorla, Iturraspe, Fabregas, Thiago, Mata, Silva, Pedro, Navas, Costa, Villa, Torres, Negredo, Llorente.
Source: ManUtd Official "De Gea and Mata in Spain squad"