Rafael Nadal of Spain poses with a koala as he arrives to take part in the Brisbane International tennis tournament in Brisbane on January 2, 2017. / AFP / SAEED KHAN / --IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE-- (Photo credit should read SAEED KHAN/AFP/Getty Images)

Rafael Nadal of Spain poses with a koala as he arrives to take part in the Brisbane International tennis tournament in Brisbane on January 2, 2017. / AFP / SAEED KHAN / --IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE--        (Photo credit should read SAEED KHAN/AFP/Getty Images)