Published on: Thursday, July 29, 2021 By: AFP Djokovic celebrates beating Fokina. TOKYO: Novak Djokovic set up a quarter-final with Japan’s Kei Nishikori at the Tokyo Olympics on Wednesday as gold medal rival Daniil Medvedev struggled with the heat, even asking the chair umpire who would be responsible if he died. World number one Djokovic continued his bid for a calendar Golden Slam by defeating 34th-ranked Alejandro Davidovich Fokina of Spain 6-3, 6-1 to extend his winning run to 21 matches. Djokovic then returned to court a couple hours later to partner Nina Stojanovic in the mixed doubles. The Serbian duo won their opening match 6-3, 6-4 against Brazil’s Marcelo Melo and Luisa Stefani.