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Aleksandar Kolarov's curling free kick in the 56th minute has helped Serbia to a 1-0 win over Costa Rica in its World Cup opener.

Serbia, which missed out on the 2014 World Cup, had the early advantage in a tough group in Russia that includes five-time champion Brazil and Switzerland, who were set to play later Sunday in Rostov-on-Don.

After a scoreless first half, Costa Rica goalkeeper Keylor Navas withstood a barrage of Serbian challenges to open the second with the boisterous Costa Rican fans cheering him on at Samara Arena.

But after David Guzman was handed a yellow card, Kolarov curled the free kick over the wall and Navas, who plays for Real Madrid, was not able to reach it.