Croatia's tennis player Marin Cilic (R) speaks with Croatia's national team Zeljko Krajan during the Davis Cup World Group final singles match between Croatia and Argentina against Argentina's tennis player Juan Martin del Potro at the Arena hall in Zagreb on November 27, 2016. / AFP / - (Photo credit should read -/AFP/Getty Images)
Croatia's national team coach Zeljko Krajan (R) and players (From L) Marin Cilic, Ivo Karlovic, Borna Coric, Ivan Dodig, listen to their national anthem prior to the Davis Cup World Group final singles match between Croatia and Argentina at the Arena hall in Zagreb, on November 25, 2016. / AFP / STRINGER (Photo credit should read STRINGER/AFP/Getty Images)
Croatia's tennis player Marin Cilic reacts after scoring against Argentina's tennis player Juan Martin del Potro during the Davis Cup World Group final singles match between Croatia and Argentina at the Arena hall in Zagreb on November 27, 2016. / AFP / - (Photo credit should read -/AFP/Getty Images)
TOPSHOT - Argentina's Juan Martin del Potro celebrates with supporters after winning the Davis Cup World Group final singles match between Croatia and Argentina on November 27, 2016 at the Arena hall in Zagreb. / AFP / - (Photo credit should read -/AFP/Getty Images)
Croatian supporters cheer on Croatia's tennis player Marin Cilic during the Davis Cup World Group final singles match between Croatia and Argentina against Argentina's tennis player Juan Martin del Potro at the Arena hall in Zagreb on November 27, 2016. / AFP / - (Photo credit should read -/AFP/Getty Images)
