Damm broke for 6-4 after a gruelling set of deuces, with Shelbayh saving break points in holds for 2-1, 3-2 and 3-3 before finally succumbing.
Damm broke for 3-1 and held for 5-2, but Shelbayh broke for 4-5 and saved break points in holds for 5-5 and 6-6 to force a tiebreak Damm won.