Australian Open 2017 28/1/2017 Ladies' final. Serena Williams (USA) defeated her older sister Venus 6-4 6-4 to win her 7th Australian Open title and 23rd grand slam title breaking Steffi Graf's record. With this win she also goes back to world No.1 in the WTA ranking . Photo Ray Giubilo Tennis - AUSTRALIAN OPEN 2017 - Grand Slam ATP / WTA - Melbourne Park - Melbourne - Victoria - Australia