Musetti broke for 1-0 and again for 3-0, then broke for 6-1, clinical in the rout, with Arnaldi's sole hold for 1-4 and Musetti's deuce hold for 5-1 saving two break points.
Musetti broke for 6-4 after a gruelling 10 minute hold for 5-4 saving all four break points, Arnaldi's resilience through eight deuces ultimately undone.