After scoring a hat-trick for Spain in their 6-1 demolition of Argentina on Tuesday, Isco hit out over his lack of playing time at Real Madrid and took a thinly veiled swipe at his club coach Zinedine Zidane.
"In Madrid I don't have the confidence a player needs", he said to the media.
"That's why the national team is so important for me as it gives me life, if I am not starting and don't have continuity for my club then I must seize all my chances".
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He added: "I don't want to go into it".
Isco is far from an automatic starter at Madrid, despite contributing five assists and five goals in LaLiga this season, and the midfielder appeared to aim a barb at Zidane after the game, noting the confidence he feels from Lopetegui helped him to star with a thrilling performance.
And now Isco, who's been linked with an off-season move to Manchester City, has sensationally claimed the incredible individual display with La Roja is down to the confidence he has when he's not with Los Blancos.
Isco has been given plenty of opportunities by the Frenchman, having started 29 matches this season, but he has been withdrawn before the final whistle on all but six occasions.
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The engine makes 469 horsepower and 479 pounds-feet of torque in the C63, and 503 hp and 516 pounds-feet of torque in the C63 S. The G 63 is due in United Kingdom dealers in the second half of this year, following its public debut at the Geneva motor show.
"Julen shows me confidence with minutes".
"I think I will be fit to play Sunday", Costa said.
Thiago Alcantara made it four shortly before the hour-mark after Nicolas Otamendi earlier headed in what turned out to be no more than a consolation for Argentina.
And, the Spanish club are now offering his services to potential other European clubs as they look make him the first of a number of summer sales.
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It said that a search operation in the villages of Sunderbani was going for the last two days following "specific inputs". Before the gunfight, the forces recovered bags containing ammunition and explosive material during searches in the area.
"We are happy, but the World Cup has not started yet".
Messi's hamstring strain meant the visitors were without their talisman and after an unconvincing qualifying campaign, Jorge Sampaoli's side have now lost two of their last three games, conceding 10 goals in the process.
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A report into the bombing also says there was a "catastrophic failure" of the public telephone helpline on the night. He said a "root and branch" review of the service was under way.