The 19-year-old has enjoyed a breakthrough season in the Premier League and his manager believes he is ready to make the step up to international football
Roberto Martinez declared John Stones "ready" for England, should Roy Hodgson call on the Everton defender for his World Cup squad.
With Phil Jagielka struggling for a large chunk of the season with a hamstring injury, Stones has impressed alongside Sylvain Distin at the heart of the Everton defence - the Goodison Park outfit now looking set for a fifth-place finish and a Europa League qualifying berth.
Phil Jones is also now a doubt for England having injured his shoulder in Manchester United's 3-1 win over Hull City on Tuesday, and it has been suggested that Stones could earn a call-up to Hodgson's squad for the finals in Brazil next month.
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Should that be the case, Martinez insists the 19-year-old would cope with the pressure.
"If he [Hodgson] decides the youngsters are going to be called up I can guarantee you they are ready," he said.
"John has had to face all sorts of strikers, he has showed incredible maturity. He's in a very good moment of form.
"Character-wise I can inform anyone that he is ready. If not [called up], John is a young man and needs to have a good summer to recover well for next season.
"The number of the age shouldn't affect the role of a player in the national team. We'll try to help the national team as much as we can."
Martinez also took time to praise Romelu Lukaku, the on-loan Chelsea forward who has netted 14 Premier League goals in another impressive campaign.
"He is capable of anything," said Martinez. "It's about developing that potential. It's been a joy to have him at the club.
"He's now facing the possibility of playing in a World Cup so the sky's the limit.
"In terms of what's around the corner for any player on loan, you should ask their parent club."