Spain got their campaign off to the perfect start after thrashing a poor Costa Rica side.
Luis Enrique’s men killed this game off in the first half – scoring three goals in the first 31 minutes.
Pedri’s dinked pass deflected into the path of Dani Olmo, who killed the ball with a smart touch before lifting it over Keylor Navas to break the deadlock.
Marco Asensio then doubled their advantage with a first-timed finish with his left foot from 14 yards out after being picked out by Jordi Alba before Ferran Torres made it three from the penalty spot.
There was no let up from La Roja in the second half with Torres taking advantage of some sloppy Costa Rica defending to sweep home his second from close range.
Gavi made it five 15 minutes from time, arriving late into the box to volley home Álvaro Morata’s cross via the help of the post to become the youngest goalscorer at a World Cup since Pele in 1958.
Substitute Carlos Soler reacted quickest to Navas parrying Nico Williams’ cross to make it six before Morata got in on the act in stoppage time to round off the victory with a placed finish after playing a one-two around the box with Olmo.
Spain, who have now achieved their biggest ever victory at a World Cup, meet Germany in their second game on Sunday.