Rio Ferdinand out of World Cup
England captain Rio Ferdinand had been ruled out of the World Cup after suffering a knee injury in their first training session since the squad arrived in South Africa.
The Manchester United defender suffered the injury on the Royal Bafokeng training pitches in the final minutes of the session.
Tottenham centre-back Michael Dawson is expected to fly to South Africa as Ferdinand's replacement with Steven Gerrard to take over the England captaincy.
"It happened near the end (Rio's injury)," Capello said. "He has gone to hospital for a scan and we will have to see how things are.
"It may well be ligaments, we will have to wait and see."
Fears that Ferdinand would miss the tournament were immediate, but England delayed the announcement after seeking a second medical opinion on the extent of the injury.
Ferdinand had been optimistic of enjoying an injury-free World Cup after a season blighted by back problems at United.
Goalkeeper David James also missed training today but Capello is less concerned with that situation and insisted the 39-year-old had "only a slight knee problem".
Gareth Barry, meanwhile, was able to train for the first time since damaging ankle ligaments in Manchester City's defeat to Tottenham at Eastlands on May 5.
The sight of Barry going through his paces with the rest of the England squad has lifted hopes that the midfielder could be fit for their World Cup opener against USA on June 12.