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Brazilian national team players Hulk (2L) and Casemiro (2R) do leg exercises during a training session, June 2, 2016 at the University of California, Los Angeles (UCLA) in preparation for the Copa America 2016, in Los Angeles. / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Brazilian national team players Hulk (2L) and Casemiro (2R) do leg exercises during a training session, June 2, 2016 at the University of California, Los Angeles (UCLA) in preparation for the Copa America 2016, in Los Angeles. / AFP / ROBYN BECK        (Photo credit should read ROBYN BECK/AFP/Getty Images)