Aston Villa midfielder Jack Grealish has been ruled out for at least three months after being admitted to hospital for a kidney injury he suffered in a friendly against Watford on Saturday.

The 21-year-old - capped with the Republic of Ireland up to U21 level but now declared for England -was forced off after a collision with Watford midfielder Tom Cleverley and boss Steve Bruce confirmed that Grealish could be in for a long spell on the sidelines.

"It will be at least three months and it could be much longer than that," Bruce told the BBC. "He's poorly at the moment, I went to see him in hospital.

"We're obviously disappointed with the injury. He's still in hospital and things aren't great. We hope that he has a speedy recovery, of course, as losing him is a blow to us."

Grealish has made 79 appearances for Villa's senior side since 2013 and played in 31 league matches last season.