England midfielder Alex Oxlade-Chamberlain looks set to miss the World Cup after the FA confirmed he has suffered a medial knee ligament injury.
Oxlade-Chamberlain, 20, limped out of Wednesday's 2-2 draw with Ecuador and his participation in Brazil now appears to hang in the balance, with his knee problem expected to take at least three weeks to heal.
A statement on the FA's official website read: "Alex Oxlade-Chamberlain sustained a medial knee ligament injury during the World Cup warm-up game against Ecuador in Miami on Wednesday.
"The England medical team are continuing to monitor and treat the injury."
Gutted to have picked up an injury yesterday. I'm staying positive and getting to work with the medical team on recovery..Fingers crossed! 💪
— Alex Ox-Chamberlain (@Alex_OxChambo) June 5, 2014
England boss Roy Hodgson expressed his fears over Oxlade-Chamberlain after the warm-up match in Miami, saying: "Oxlade-Chamberlain is the one that bothers. His knee buckled under the challenge as the player turned into him."
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The Arsenal man now looks likely to miss the World Cup, having battled back from a mid-season injury to make Hodgson's 23-man squad.
Manchester United midfielders Michael Carrick and Tom Cleverley are among the potential replacements England could call on, while Everton defender John Stones and Liverpool full-back Jon Flanagan were also on Hodgson's reserve list ahead of the tournament, along with strikers Andy Carroll and Jermain Defoe.