DARWIN, AUSTRALIA - JULY 19:  Nick Kyrgios of Australia and Thanasi Kokkinakis of Australia show their support during the reverse singles match between Lleyton Hewitt of Australia and Aleksandr Nedovyesov of Kazakhstan during day three of the Davis Cup World Group quarterfinal tie between Australia and Kazakhstan at Marrara Sporting Complex on July 19, 2015 in Darwin, Australia.  (Photo by Scott Barbour/Getty Images)