The young Russian player had an almost memorable week in Cincinnati, barring the final when he was comfortably beaten in a one-sided clash.
Russian sensation Rublev registered his maiden victory over his compatriot to reach the final of the Western & Southern Open.
The German overcame a double break in the third set to beat Greek star Stefanos Tsitsipas in the semifinal of the Western & Southern Open.
The Greek star squandered two match points in the second set but still managed to earn a spot in the last four in Cincinnati.
Naomi Osaka was stunned 3-6, 6-3, 6-3 by wild card entry Jil Teichmann in the Western & Southern Open's third round in Cincinnati.
The Japanese player came from a set down to beat the American teenager in her second-round clash at the Western & Southern Open.
The Italian star came from a set down to get past Albert Ramos-Vinolas in the second round of the Western & Southern Open.