Paraguay easily beat Yugoslavia in the opening Kirin Cup match at Tokyo's National Stadium.
Hosts Japan meet Paraguay at the Sapporo Dome on Sunday and by then the South American team will know if the Copa America is to go ahead next month after the kidnapping of the Colombian federation's vice-president saw calls for a change of venue.
Defender Juan Daniel Caceres gave Paraguay the lead in the 39th minute when he was the first player to reach a rebound after goalkeeper Ivica Kralj fluffed a clearance.
Virgilio Ferreira sealed the win in the 83rd minute when he scored from a dropping ball at a corner kick.
Igor Bogdanovic hit the post in the 89th minute with a cross shot in Yugoslavia's best chance of a low key game.
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