United States striker Jozy Altidore has been hospitalised with a sprained ankle.

Villarreal striker Altidore missed practice on Thursday due to the injury but American broadcaster ESPN said hospital X-rays ruled out any serious damage. The reported added that Altidore's fitness was being assessed on a day-to-day basis.

The 20-year-old, who spent last season on loan at Hull, had been expected to lead the US attack against England in their opening World Cup game in Rustenburg on June 12.