Ostapenko got off to a roaring start in the first set, as her overwhelming returns and groundstrokes were then too hot for Ahn to handle. Ostapenko jumped out to a 4-0 lead after a stunning service return allowed her to break Ahn at love.
The Latvian gave one break back, dropping serve in the next game due to two double faults, and Ahn used that to spur herself on to a love hold for 4-2. But that would be the extent of Ahn’s scoreboard presence in the opening frame, as the searing Ostapenko service returns propelled her to another love break at 5-2, garnering her the one-set lead.
But the tables turned in the second set, as Ostapenko used those scintillating shots to twice go up a break at 2-0 and 4-2, but in each instance let the breaks go due to mounting unforced errors. By contrast, the Ahn service effectiveness increased, and once the American got back on serve at 4-3, she did not face a break point for the remainder of the set.
In the second-set tiebreak, Ostapenko dropped three points in a row with errors to hand Ahn a commanding 5-1 lead, but two forehand errors on Ahn’s service points contributed to Ostapenko fighting back to 5-5. However, an ace by Ahn pulled her to 6-5 and set point, and the American converted her chance when Ostapenko fired a forehand miscue long.