"World Tennis No. 1 Novak Djokovic Takes Centre Court For Children With Appointment as UNICEF's Newest Goodwill Ambassador" (Press release).
^ “World Tennis No. 1 Novak Djokovic Takes Centre Court For Children With Appointment as UNICEF’s Newest Goodwill Ambassador” (2015年8月26日). 2015年10月12日閲覧。