qatar open

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

Duo have met each other three times but not since 2014

German crashes out of tournament after 6-4, 0-6, and 6-4 defeat to Kasatkina

Serb ousts Bulgarian from Qatar Open