Description After his long battle with back pain and then a shoulder surgery, Shah Rukh Khan is now dealing with a recurring pain in his knee. The actor had injured his knee some time back and it has been troubling him ever since. This time, hes not in a mood to take any chances with any quick fix measures — Kolkata Knight Riders physiotherapist Andrew Leipus has been assigned the responsibility of treating SRKs knee. Earlier, physiotherapist Ali Irani was treating the actors knee. Our source said, SRK is doing some high energy stunts in his home production Ra.One which will be filmed soon. The last two days of the shoot were cancelled because of Bobby Chawlas (CEO of SRKs Red Chillies) health scare. The next schedule of Ra.One is drawing near and SRK hopes the exercises Andrew has prescribed will fix his knee problem in time. Earlier, Shah Rukhs back problem had given him a lot of trouble during an energetic song sequence he did for Boney Kapoors Shakti. Ra.One is a superhero film and Shah Rukhs character will have to do several high risk stunts and he really needs to be physically fit to pull them off, added the source. SRK remained unavailable for comment.