Andrey Rublev was crowned champion at the Open 13 Provence after downing Felix Auger-Aliassime 7-5 7-6 (7-4) in the final.
Auger-Aliassime defeated Rublev in Rotterdam last week on the way to securing his maiden ATP Tour title, though all of their past meetings had required a deciding set.
Canadian Auger-Aliassime immediately broke Rublev, but the world number seven battled back to eventually claim the first set after a tense 56-minute opening exchange.
The pair twice exchanged breaks in the following set, with Rublev failing to serve out for the match at 5-4 before saving a set point at 5-6 down.
Rublev rallied from that point onwards, however, claiming his ninth tour-level triumph after a second set tie-break.
The Russian will look to become just the third man in the tournament’s 30-year history to win the singles and doubles titles in the same edition when he takes to the court with Ukraine’s Denys Molchanov in the doubles final.