West Ham defender Calum Davenport's loan deal at Watford has been terminated after he broke his neck on his Hornets debut.
The centre-half, 25, suffered the injury against Charlton on Saturday when team-mate Darius Henderson landed on top of him.
Davenport will remain in hospital for the next few days.
Hornets boss Aidy Boothroyd said: "Calum heard a crack and lost the sensation in his fingers."