CHENGDU, CHINA - OCTOBER 02: Karen Khachanov of Russia takes selfie with fans after winning  the singles final match against Albert Ramos-Vinolas of Spain on Day 7 of 2016 ATP Chengdu Open at Sichuan International Tennis Centre on October 2, 2016 in Chengdu, China.  (Photo by Zhong Zhi/Getty Images)
CHENGDU, CHINA - OCTOBER 02:  Karen Khachanov of Russia signs autographs for fans after winning  the singles final match against Albert Ramos-Vinolas of Spain on Day 7 of 2016 ATP Chengdu Open at Sichuan International Tennis Centre on October 2, 2016 in Chengdu, China.  (Photo by Zhong Zhi/Getty Images)
CHENGDU, CHINA - OCTOBER 02:  Karen Khachanov of Russia poses with the trophy after winning  singles final match against Albert Ramos-Vinolas of Spain on Day 7 of 2016 ATP Chengdu Open at Sichuan International Tennis Centre on October 2, 2016 in Chengdu, China.  (Photo by Zhong Zhi/Getty Images)