CHENNAI, March 21 -- Defending IPL champions Chennai Super Kings suffered a blow ahead of the season with South African pacer Lungi Ngidi being ruled out of the tournament due to a side strain suffered during the ODI series against Sri Lanka. "Lungi felt discomfort while bowling during the last ODI against Sri Lanka at Newlands and immediately stopped bowling. Further scans revealed a Grade II muscle strain which will need up to four weeks of rest followed by a rehab programme leading up to the World Cup," South Africa team manager Dr Mohammed Moosajee was quoted as saying on the ICC website....