Boulter broke for 1-0 and held a clinical 6-4, saving four break points in a hold for 6-4 after Lee's resilient 13 minute hold for 1-2 saved all four break points.
Breaks traded: Boulter for 1-0, Lee for 1-1 and 5-3. Lee took it 6-3.
Boulter broke for 2-0 and again for 4-0 in a gruelling 11 minute hold, then broke for 6-0 to dismantle Lee 6-0 in ruthless fashion.