MELBOURNE, VIC - JANUARY 19: GRIGOR DIMITROV (BUL) during day five match of the 2018 Australian Open on January 19, 2018 at Melbourne Park Tennis Centre Melbourne, Australia (Photo by Chaz Niell/Icon Sportswire via Getty Images)
MELBOURNE, VIC - JANUARY 19: GRIGOR DIMITROV (BUL) during day five match of the 2018 Australian Open on January 19, 2018 at Melbourne Park Tennis Centre Melbourne, Australia (Photo by Chaz Niell/Icon Sportswire via Getty Images)