Ace Indian shuttler from Hyderabad Saina Nehwal said that she is going through rehabilitation and looking to make a comeback by December this year. She hopes to get fit by December and is confident of an improved show. The former World No.1 has fallen four places down after Rio Games and is now placed at nine. The London Games bronze medallist failed to progress beyond group State in the recently concluded Rio Games with injury. She underwent a knee surgery last month at the Kokilaben Dhirubhai Ambani Hospital in Mumbai. She is working with a physio on regaining full strength ahead of the Dubai World Superseries Finals.