Heather is 387 points behind, so could make up the difference with a good run in one or more tournaments. Liv and Tereza could equally add points, so the outcome isn't certain for a few weeks yet.
The gap appears to be 427 points ( 2055 to 1628 ) after adding in Liv's 215 ( net 130 ) points from here.
Also Heather gathered quite a lot of doubles points late on last year She has 5 counters totalling 402 ( net 296 ) points due to drop off by year end. Liv has 0 net points due to drop off.