The forward missed training on Monday, which the club have responded to by issuing a public warning.
Adriano only recently joined the Rio giants after leaving Corinthians earlier this year.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.