British number one Jack Draper was beaten in three sets by Andrey Rublev in the Qatar Open final.
Draper was seeking a third career ATP Tour title but lost 7-5 5-7 6-1 to the world number 10 in Doha.
The opening two sets featured just one break of serve for either player, but the decider was more one-sided.
As Draper visibly tired, Rublev broke twice to race into a 4-0 lead, before comfortably holding serve to seal victory.
Despite the disappointment Draper, who reached the Australian Open fourth round in January, will rise up to a career-high 12th in the world rankings.