20 November, Grayson reiterated his desire to keep Kisnorbo but stated that he had to prove his fitness before being offered a new deal at Leeds. Kisnorbo got an infection on his Achilles tendon injury, and stepped up his rehab by going to the US for treatment. Kisnorbo returned to Leeds' training ground Thorp Arch during mid January. However, on 11 March 2011, it was confirmed that he would not play again in the 2010–11 season. As Kisnorbo's contract was set to expire in June 2011, he had to prove his fitness to the coaching staff at Leeds in the hope of earning a new contract, or be free to join another club. In March 2011, Kisnorbo returned to full training with Leeds after his long spell out injured. In Leeds' penultimate game of the season, against Burnley, Kisnorbo made the provisional squad but failed to make the substitutes bench. On 6 May, Grayson revealed the club were going to offer Kisnorbo a new contract on a short term deal, which, if he accepted, would allow him more time to earn a new long term deal once he proved his fitness. On 7 May, Kisnorbo was named on the bench for Leeds against Queens Park Rangers, the first time he was included in a matchday squad since suffering his ruptured Achilles tendon. Kisnorbo made his first appearance of the season as a second-half substitute against QPR in the final game of the season. 2011–12 season With Kisnorbo only on a short term contract to prove his fitness, Crystal Palace and Brighton & Hove Albion were linked with signing the player. Manager Simon Grayson then claimed that he was looking for Kisnorbo to prove his fitness before offering him a longer term contract. After completing his injury rehab in his native Australia, Kisnorbo returned to pre-season training for Leeds United a week later than his teammates. After returning from his long injury lay off, and proving his fitness, Kisnorbo signed a new two-year contract at Leeds on 10 July. Kisnorbo revealed he wouldn't be wearing his iconic head bandage for the 2011–12 season as he wanted it to represent a new start for him. Kisnorbo scored the opening goal in the pre-season friendly victory against Newcastle United. Kisnorbo started for Leeds on the opening day of the season as they suffered a 3–1 defeat against Southampton. It was his first competitive