Nick Kyrgios is trying to stay positive; says he has 'vision and goal'

The 22-year-old was eliminated by Dimitrov in the fourth round of the Australian Open. 

The Overnight—How Hyeon Chung out-Djokovic-hed Nole; Tennys' dream run

Plus: how the departed Su-Wei Hsieh made our collective jaws drop at the Australian Open.