Kerber broke Williams, who made 23 unforced errors to the German's three, twice before she served it out on 39 minutes -- the first set the world number one has lost all tournaments.
Germany's Angelique Kerber hits a return against Serena Williams of the US during their women's singles final on day thirteen of the 2016 Australian Open tennis tournament in Melbourne. AFP
Angelique Kerber won the first set of the Australian Open final 6-4 against an error-prone Serena Williams on Saturday as she seeks her first Grand Slam title.
