Masnada, who plays for QuickStep – Alpha Vinyl, arrived alone and immediately took over the leader’s jersey from Dane Anthon Charmig. His Swiss team mate Mauro Schmid finished second just over a minute behind him. He won the sprint of a group of seven that also included Charmig.
The 28-year-old Masnada won a stage in the Giro d’Italia three years ago. The Tour of Oman ends on Tuesday.