Kumar Sangakkara has stepped down as captain of Sri Lanka's ODI and T20 teams three days after his side's defeat to India in the final of the ICC Cricket World Cup. He has, however, offered to continue to lead the Test side on an interim basis for the upcoming series against England and Australia if it is considered helpful for the new captain. A statement from Sangakkara said in Colombo today that he has taken the decision after careful consideration. He said it is in the best long-term interests of the team that he steps down now as national captain so that a new leader can be properly groomed for the 2015 World Cup in Australia.Sangakkara further said, it was a decision he made prior to the 2011 World Cup. Thilan Samaraweera is likely to be named Sangakkara's successor for the Test side, while Tillakaratne Dilshan and Angelo Mathews are discussed as options to take charge of the ODI and T20 sides.The 33-year-old left-hander, however, is keen to continue playing in all formats of the game for the next few years.