Aston Villa defender Stephen O'Halloran has flown to the United States for treatment on his knee ligament injury.

The 20-year-old damaged his cruciate ligament warming up for his first game for Leeds during a recent loan spell.

He will see renowned specialist Dr Richard Steadman whose previous clients include Michael Owen and O'Halloran's Villa team-mate Martin Laursen.

The left-back is set to have surgery and faces several months out of action.