Pakistan defeated World T20 defending champions Sri Lanka by 15 runs in their warm up match at the Eden Gardens in Kolkata today. Mohammad Hafeez struck an unbeaten 70 from 49 balls to help Pakistan post 157/5 before they restricted Sri Lanka for 142/9 in front of a cheering crowd of more than 10,000. Pakistan rookie left-arm spinner Imad Wasim rattled the Lankan chase with his tidy 4/25 from four overs. This was Sri Lanka's second successive loss in the warm up after going down to New Zealand by 74 runs in Mumbai.Pakistan open their campaign against qualifiers Bangladesh in Kolkata this Wednesday. while the next day Sri Lanka face qualifiers Afghanistan.