Coco Gauff advanced to the quarterfinals of the Wuhan Open with a 6-4, 6-1 rout of 17th-ranked Marta Kostyuk in just over an hour on Thursday. It was the fourth-ranked Gauff’s eighth consecutive win on the WTA Tour’s Asian swing after the American won the China Open last week which moved her back into the top five in the rankings. Gauff fired two aces and broke the Ukrainian’s serve five times — for the loss of one of her own — as she clinched a one-sided match and extended her lead in their head-to-head series to 3-1.