Mary Carillo: Athletes like Djokovic think 'science is just another opinion'

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NBC Sports' Mary Carillo joins Chris Jansing as the world's sports organizations wrestle with how to proceed in the midst of the pandemic. Carillo, citing tennis player Novak Djokovic's COVID-19 diagnosis following a tournament he hosted, says the player has gone from the top of his game to "nothing but unforced errors"