Former MotoGP World champion Nicky Hayden has crashed during a track training session and thrown into doubt his participation in January testing in Sepang, Malaysia.His Ducati team said the 30-year-old American was only just back on his bike after crashing during the Valencia GP in November, 2011.This time he has broken his left shoulder blade and two ribs, although Ducati said he might not need surgery, pending an assessment in California.'STARTING TO TRAIN'"Obviously, injuries are never good," Hayden said in a statement released by Ducati, "but it's part of motorcycle racing. Just like at Valencia, it was kind of a freak accident. I was starting to train again, like I normally do during the winter, at a private track near my house."I came up behind another rider and he went to move out of the way. I wasn't going that fast but he clipped my front wheel and I went down and landed pretty hard on my left shoulder, and that was it."It's disappointing, but there's nothing to do about it but heal quickly. Anyway, this doesn't change my expectations for 2012 which, fortunately, is just around the corner."The first race of the new season will take place at the desert circuit of Losail in Qatar on April 8, 2012.