Second seed Kerber stunned by debutant at Open


World number two Angelique Kerber was dumped from the Australian Open by unseeded American Danielle Collins Sunday in the biggest upset yet at this year's season-opening Grand Slam.

Collins, making her debut in the tournament main draw, humiliated the German three-time major champion 6-0, 6-2 to set up a quarter-final clash with either fifth seeded fellow American Sloane Stephens or Russia's Anastasia Pavlyuchenkova.