Polish voters will cast their ballots in a tight second-round vote to decide whether centrist Rafal Trzaskowski or conservative Karol Nawrocki will become their next president. At stake is the future of the current coalition government's reform agenda.

Poland is set to hold a presidential runoff election in which a right-wing nationalist and a pro-European liberal are running neck-and neck.

A runoff election on Sunday pits a centrist against a nationalist who represent mainstream parties. The outcome is unclear given that many under 30 prefer candidates on the political fringes.