African Nations Cup and in Germany, Argentina and the United States held a number of leagues before the World Cup, soccer also use this.

非洲国家杯和在德国、阿根廷和美国国内的一些联赛在世界杯举行之前也有使用这个足球。

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Soccer fans in the United States who have grown up in a nation filled with college athletics and closed professional sports leagues while simultaneously watching open soccer leagues with promotion and relegation elsewhere in the world have a unique perspective on how professional sports can be run.

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