Boulter took a two-week break before US Open and she looked great in 1st round match against Parry. Wang is on a 10-game winning streak but her wins mostly came against lower-ranked players. For comparison, both players played against Bassols Ribera over the last few weeks and both won in 2 sets (6-2, 6-2 in both matches). So this could be a pretty even match but I see Boulter coming away with a win in this one.