<Ul> <Li> Ivo Karlović came from two sets to love down to defeat Horacio Zeballos 6--7, 3--6, 7--5, 6--2, 22--20 . The 84 games which were played is the longest Australian Open match (by number of games played) since the introduction of tiebreaks in 1971 . Time-wise, the match was the second - longest in Australian Open history, only behind the five - hour and 53 - minute 2012 final between Novak Djokovic and Rafael Nadal . Karlovic also set a new Australian Open record, hitting 75 aces in the match . </Li> </Ul> <Li> Ivo Karlović came from two sets to love down to defeat Horacio Zeballos 6--7, 3--6, 7--5, 6--2, 22--20 . The 84 games which were played is the longest Australian Open match (by number of games played) since the introduction of tiebreaks in 1971 . Time-wise, the match was the second - longest in Australian Open history, only behind the five - hour and 53 - minute 2012 final between Novak Djokovic and Rafael Nadal . Karlovic also set a new Australian Open record, hitting 75 aces in the match . </Li> <Ul> <Li> Denis Istomin defeated 6 - time champion Novak Djokovic in five sets . It was Djokovic's earliest exit from a grand slam since his second round loss at the 2008 Wimbledon Championships . </Li> <Li> Mirjana Lučić - Baroni defeated Agnieszka Radwańska in two sets . It was Radwańska's earliest exit in the tournament since her first round loss at the 2009 Australian Open . As a result, Lučić - Baroni advanced to the third round of the Australian Open for the first time since the 1998 Australian Open . </Li> </Ul> <Li> Denis Istomin defeated 6 - time champion Novak Djokovic in five sets . It was Djokovic's earliest exit from a grand slam since his second round loss at the 2008 Wimbledon Championships . </Li>

Who won the australian open tennis this year