Humidity is only 50% all week - that's pretty nice.
Pollution is definitely the old problem but playing doubles would hardly increase your exposure much.
Either way, Emma is still coasting:
R2
(6) Emma Raducanu def. Isabelle Haverlag (NED) 6-1 6-3
Emma's semi-final opponent reached the quarter-finals of the Eddie Herr G1. Prior to that her record wasn't exceptional, but may have suddenly stepped up a level