Mahela Jayawardene struck a scintillating century as Sri Lanka thumped Zimbabweby 14 runs via Duckworth-Lewis method in a rain-marred Group B match to brighten their Super Eight stage prospects in the Twenty20 World Cup today.Beaten by New Zealand in their previous outing, a win was imperative today for the Lankans who rode on Jayawardene's masterly 64-ball 100 – fourth century in the short history of Twenty20 Internationals – to post 173 for seven.Zimbabwe's chase ran into a rain-interruption after the first over from Ajantha Mendis. Play did resume after 66 minutes with the minnows chasing a revised victory target of 104 runs from 11 overs but another weather-disruption greeted them four overs later when they were 29 for one.Consequentially the Duckworth-Lewis method was invoked and Zimbabwe were found 14 runs behind their opponents.