Spain thrashed Costa Rica 7-0 on Wednesday, their biggest ever winning margin at a World Cup.
The 2010 champions were helped by two goals by Ferran Torres and strikes by five other players to send a resounding message to the rest of the teams in Qatar.
Spain were mindful of the shock defeats suffered by Argentina and Group E rivals Germany against lower opposition in their opening matches and they tormented Costa Rica from the start, going 3-0 up after little more than 30 minutes.
Dani Olmo got the goals flowing in the 11th minute when he exchanged passes with Gavi and chipped Costa Rica goalkeeper Keylor Navas.
Ten minutes later, Marco Asensio timed a run into the box perfectly to connect powerfully with a Jordi Alba cross.
Torres stroked home his penalty in the 31st minute and the Barcelona winger claimed his second in the 54th when he took advantage of hesitant defending.
Gavi, the youngest player to represent Spain at a World Cup, struck with a perfectly hit volley in the 74th minute before substitutes Carlos Soler and Alvaro Morata rounded off a totally one-sided encounter.
Sherfane Rutherford struck an unbeaten half-century and Gudakesh Motie produced a brilliant display of spin bowling as West Indies thumped England by 30 runs in a Twenty20 World Cup Group C encounter on Wednesday.
Australia launched their Twenty20 World Cup campaign with a commanding 67-run victory over Ireland in Colombo on Wednesday, powered by four-wicket hauls from Nathan Ellis and Adam Zampa.
Tottenham Hotspur have sacked manager Thomas Frank after eight months in charge, the Premier League club said on Wednesday, after a woeful run of results left the north London club hovering five points above the relegation zone.
South Africa survived Kagiso Rabada's final-over meltdown against Afghanistan and then a double Super Over drama before prevailing in a heart-stopping Group D match of the Twenty20 World Cup on Wednesday.
Pakistan opener Sahibzada Farhan has hit a swift half-century as the 2009 champions comfortably beat the US by 32 runs on Tuesday, clinching their second straight Group A win in the Twenty20 World Cup.