But the Dane returned to winning ways with 23 winners as world number 88 King produced an error-strewn display, double-faulting on set point on both occasions to hand Wozniacki victory.
She won despite double-faulting on her first match point and hitting the net with a forehand on her second, but still managed 27 winners against 13 unforced errors in those last two sets, having been 12-123 in the first.