Angelique Kerber became the first German to win a Grand Slam title since her childhood idol Steffi Graf in 1999 when she upset world number one Serena Williams 6-4, 3-6, 6-4 to clinch the Australian Open on Saturday. The 34-year-old American had been seeking her seventh Melbourne Park title and 22nd overall, which would have moved her into a tie with Graf for the most Grand Slam singles titles in […]