Siniaková broke for 1-0 and held for 2-0 saving a break point in an 8 minute game, taking the set 6-4 despite Stearns' resilience.
Stearns broke for 2-0 and again for 4-0, then for 6-0, dismantling Siniaková in a clinical 24 minute shutout.
Siniaková retired with Siniaková ahead 4-0.