3) Rangana Herath (Sri Lanka)
Sri Lanka's Rangana Herath will be the spinner to look as well in World Cup 2015. Herath, an orthodox left-arm spinner has taken over the space left vacant by Muralitharan.
His strengths are his accuracy and his ability to bowl long spells, but to that he has added a 'mystery' ball, a delivery that is quicker and darts back into the right-hander.
A successful test bowler for the island nation however didn't enjoy much success in ODI cricket.
He didn't had a good run in 2014 after having picked just 13 wickets in 9 matches.
He has emerged as the mainstream bowler for Sri Lanka with accurate line and length and could be the biggest match winner.
4) Jeevan Mendis (Sri Lanka)
Jeevan Mendis' all round skills makes Sri Lanka rely on him. His leg-break spin balls makes batsman uneasy. He says batsmen find it difficult to read his leg spin or googly because of the way he grips the ball.
He suffered a constant failure with the ball. In last 15 ODIs he could pick just 4 wickets. But in his first appearance in World Cup, he can be used as a back-up spinner and support the likes of Herath and Senanayake from one end.
However his inclusion in the squad came as a shock to many Sri Lankan cricket experts.
5) Sachithra Senanayeke (Sri Lanka)
Cleared of suspect bowling after undergoing corrective action, off-spinner Sachithra Senanayake was included in Sri Lanka world cup squad. He was initially banned by the ICC in July 2014 for a suspect bowling action but later cleared after corrective action was taken to rectify his delivery stride.
He had mixed fortunes in the ODI series against England in June 2014 - remarkable figures of 4 for 13 that skittled England out for 99 were offset by news of his action being reported as suspect.
While the controversy didn't stop him from being at the centre of a tense series win for Sri Lanka - he was also involved in a Mankading incident against Jos Buttler in the decider.
He was the fifth highest wicket taker in 2014 with 27 wickets in 18 matches at an economy of 4.38.