World no 35 does dab after defeating world no 1 in Aus Open
World number 35 Coco Vandeweghe did a dab celebration on court after knocking out world number one Angelique Kerber from the Australian Open on Sunday. Kerber, the defending champion, was defeated by the American 2-6, 3-6 in the fourth round. Vandeweghe will now face French Open champion Garbine Muguruza in the quarters.