Serena takes aim at history in Australian Open final

Serena Williams will take aim at Steffi Graf's Open-era record of 22 Grand Slam titles on Saturday when she plays the Australian Open final against Germany's Angelique Kerber, who is hoping to pull off a major upset. The world number one is the overwhelming favourite to win her seventh crown at Melbourne Park and match Graf's career Grand Slam haul, warning she is in even better form than last year, when she won three major titles. Hopefully I'm playing better," Williams said, adding that at 34