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In the fourth round, Istomin lost to Grigor Dimitrov of Bulgaria in four sets 6:2, 6:7, 2:6 and 1:6.
The match lasted 2 hours and 24 minutes. Dimitrov registered two aces, one double fault and four break points.
Istomin, in his turn, served 14 aces, committed one double fault and clinched two break points.