Monaco's world number 204 Valentin Vacherot defeated his cousin, Frenchman Arthur Rinderknech, 4-6 6-3 6-3 in the final to secure his first ATP title.
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.
The victorious Vacherot was overwhelmed with emotion, before sharing a heartfelt embrace with his older cousin Rinderknech, 30.
Vacherot had earned a little under $600,000 in career prize money but lifting the trophy in Shanghai will see him pocket over $1 million.
Author's summary: Vacherot wins first ATP title.