Maciej Janowski took the victory from championship leader Jason Doyle and Matej Zagar.
Poland take home their eighth Ove Fundin Trophy.
He led the team to victory in the race-off, to take them through to the final for the first time in four years.
Sweden sail through to the Speedway final, but captain Lindgren wants more from his team.
Jason Doyle is currently suffering with three broken bones in his foot.
Team captain Emil Sayfutdinov leads Russia to race off victory, seeing them through to the World Cup final.