Monaco's Valentin Vacherot, world number 204, defeated his cousin Arthur Rinderknech 4-6 6-3 6-3 in the Shanghai Masters final.
The 26-year-old's victory made him the first player from Monaco to win an ATP singles title and set a record as the lowest-ranked player to triumph at an ATP Masters 1000 event.
He was overwhelmed with emotion before sharing a heartfelt embrace with his older cousin Rinderknech, 30.
Author's note: Vacherot wins first ATP title.