Australian Open 2017 Day 4-Second round Denis Istomin (UZB) defeated seed N.2 Novak Djokovic (SRB) 7-6(10-80 5-7 2-6 7-6(7-5) 6-4 Photo Ray Giubilo Tennis - AUSTRALIAN OPEN 2017 - Grand Slam ATP / WTA - Melbourne Park - Melbourne - Victoria - Australia