FILE - In this May 30, 2016, file photo, fans cheer as Golden State Warriors guard Stephen Curry yells after the Warriors beat the Oklahoma City Thunder in Game 7 of the NBA basketball Western Conference finals in Oakland, Calif. The roar of the crowd has been a staple of major sports and an advantage for the home team. Playing in empty buildings would require a significant recalibration. (AP Photo/Ben Margot, File)
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