The 29-year-old Australian defender, who was Leeds' player of the year last season, returned to Yorkshire recently after spending time in the United States as part of his recovery.

"Paddy's been in America, but he's back with us now to continue his rehab," Grayson told leedsunited.com.

"We have never put any timescale on him, but it's good to have him back around everyone and we're delighted he's here.

"He's a big character to have around the place."

Kisnorbo, who has not played for Australia since November 2009, sustained the injury in March last year.