Grigor Dimitrov takes off to old heights with a new coach

Grigor Dimitrov has already reached the quarter-finals at the Australian Open for the fourth time in his career. The Bulgarian has recently started working with Dante Bottini, whom Kei Nishikori trusted for a long time. On Tuesday, Dimitrov, who took part in the 2017 semi-finals, will face Russian Aslan Karatsev.