Cameron Norrie secured his first win on the ATP Tour since July as he came from behind to beat Roberto Carballes Baena at the Moselle Open in Metz.
British number two Norrie fought back from a set and a break down to win 3-6 6-4 6-3 in a rollercoaster match against the Spaniard.
It marks his first Tour victory since beating Jozef Kovalik in the first round of the Swedish Open nearly four months ago.
A forearm injury led to Norrie missing several tournaments over the summer, including the Olympics and US Open, before he returned last month.
"I was happy with the way I turned it around, and it's nice to get a win," Norrie said.
The 29-year-old, ranked 57th in the world, will play Bulgarian third seed Grigor Dimitrov in the second round on Wednesday.
Norway's Casper Ruud and Russian top seed Andrey Rublev are in action in the French city on Tuesday as they seek to secure places at the season-ending ATP Finals, which starts on Sunday in Turin.
With three places up for grabs, Novak Djokovic, currently ranked sixth, Ruud (seventh), Alex de Minaur (eighth) and Rublev (ninth) remain in contention.
Djokovic is not playing this week, having withdrawn from last week's Paris Masters, while De Minaur is top-seeded at the Serbia Open.