Explainer-Tough talks beckon for winner in Sweden's close-run election

FILE PHOTO: Swedish Prime Minister Magdalena Andersson, party leader of the Social Democrats, gives a speech in the city of Falun, Sweden, on Sept. 05, 2022. Andersson is campaigning in Borlange and Falun, ahead of the general elections scheduled for 11 September 2022. Pontus Lundahl /TT News Agency/via REUTERS

STOCKHOLM (Reuters) - Tough talks and trade-offs await the winning side in Sweden's parliamentary elections with the governing centre-left and their right-wing challengers facing weeks of uncertainty should they come out on top.

Opinion polls ahead of the Sept. 11 vote show Social Democrat Magdalena Andersson and her allies running neck-and-neck with a right-wing bloc where Ulf Kristersson, leader of the conservative Moderates, is the main candidate to unseat her as prime minister.