Williams, who missed out on the final cut for the Socceroos 2010 World Cup squad due to the injury, has not played for Middlesbrough since April 24.

But the 22-year-old Perth-born youngster got through half a game last week against Sheffield United in a friendly and could soon be in the first-team frame.

Boro boss Tony Mowbray told the Middlesbrough Evening Gazette: "It was terrific to see Rhys back. He's getting closer all the time.

"Rhys looked like a fantastic athlete who cruises around the pitch. So it will be great to have him available in the near future."

Mowbray said Williams' return would be like a 'new signing' for Boro who are currently battling the drop in England's Championship sitting down in 20th.