Chennai Super Kings' Indian Premier League campaign received a huge blow today with reports of skipper Mahendra Singh Dhoni being ruled out of action for the next 10 days because of an elbow injury. A team management source told PTI, that Dhoni will be out of action for the next 10 days and the exact nature of his injury is being examined by the doctors at a private hospitals. Dhoni underwent an X-ray test after being hit by a rising Shane Bond delivery on Tuesday's match against Kolkata Knight Riders at Eden Gardens even though coach Stephen Fleming ruled out any major injury to the India skipper.