Wickremensignhe’s main challengers — opposition leader Sajith Premadasa and parliamentarian Anura Dissanayake, a surprise top contender who heads a new leftist coalition — have promised major political changes, including renegotiating a deal with the International Monetary Fund to win more favorable terms.

More than 17 million of Sri Lanka's 22 million people are eligible to vote at the presidential election that has shaped up to be a close contest between incumbent President Ranil Wickremesinghe, main opposition leader Sajith Premadasa.