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18-year-old came through 6-4, 7-6 (8/6) against Russian top seed to reach his maiden ATP semi-final

Czech edged out Japanese star 7-6 (8/6), 7-6 (7/5) in straight sets

This was former world number one's second win from the five matches

Russian star beats British veteran 6-4, 6-4 in final for his second silverware in a week

British veteran saves five match points to beat Lehecka 6-0, 3-6, 7-6; will face Medvedev for title

British tennis star wins grueling contest 7-6 (7/5), 2-6, 7-5 against German to reach quarter-finals

Spanish tennis player beats former world number 6-0, 6-1 in second round

39-year-old was knocked out of the Doha event by Georgia's Basilashvili and would rather 'go back to training'

World number 21 won 3-6, 6-4, 6-3 against the former French Open champions and rise to number 16 in the next rankings

Newly-crowned Australian Open champion and world number one Naomi Osaka also withdrew days before the start