Alexander Bublik claimed the biggest win of his career with a surprise victory over world number three Alexander Zverev in the final of the Open Sud de France.
Bublik needed just 70 minutes to record a 6-4 6-3 success and capture his maiden ATP Tour title in Montpellier.
The 24-year-old from Kazakhstan, who was competing in his fifth tour-level final, fired eight aces and won 86 per cent of points behind his first serve to improve his head-to-head record against Zverev to 2-0.
Portugal's Joao Sousa defeated Finland's Emil Ruusuvuori 7-6 (9) 4-6 6-1 to win his first ATP Tour title in four years in the Tata Open Maharashtra in Pune.
Sousa, 32, recovered from being a break down in the first set and although 22-year-old Ruusuvuori did the same in the next to force a decider, Sousa used his greater experience to come through an entertaining contest lasting two hours and 43 minutes.
Chilean qualifier Alejandro Tabilo battled past top seed Diego Schwartzman on Saturday to win his first ATP Tour final with a 6-3 7-6(6) upset in the final of the Cordoba Open.