Didn't see when the issue occurred, but Katie could easily have been in the locker room after a straight sets defeat, so all credit for managing to stick in, save the match points, and take advantage.
Some very good tennis from Heather but this one was really about Kovinic who fluctuated wildly in energy and quality. Heather had two individual set points at 6-5*, the first she didn't do enough with the second serve return, the second she went for too much in the rally.
A bad double gave Heather *5-2 in the double, and another error for *6-2. Heather plays a couple of tight rally balls but Kovinic balloons long.