Hsieh Su-Wei lifted her third career trophy at the Hana-Cupid Japan Women's Open after a straight-sets defeat of 17-year-old Amanda Anisimova.
No.8 seed Pauline Parmentier picked up multiple titles in one season for the first time, adding to her 2018 trophy haul by winning the Coupe Banque Nationale présentée par IGA over qualifier Jessica Pegula.
Bethanie Mattek-Sands claimed her eighth Grand Slam title - and her first since coming back from knee injury - partnering with Jamie Murray to win US Open mixed doubles.
At 20 years old, Naomi Osaka made a lifelong dream come true by beating 23-time Grand Slam champion to win her maiden major title in New York. Find out what's next for the Japanese youngster in her champions press conference.
20-year-old Naomi Osaka became the first to win a Grand Slam singles title from Japan, sealing 23-time Grand Slam champion Serena Williams in straight sets in a dramatic US Open final.
Ashleigh Barty and CoCo Vandeweghe saved two championship points to shock Australian Open champions Timea Babos and Kristina Mladenovic and each win their first Grand Slam title at the US Open.
Six-time champion Serena Williams claimed 12 of the final 13 games en route to a straight-set victory over Anastasija Sevastova and a trip to her 31st Grand Slam championship match at the 2018 US Open.
20-year-old Naomi Osaka moved into the biggest final of her career, fending off last year's finalist Madison Keys to reach the championship match of the 2018 US Open.
Serena Williams needed three sets to maneuver past powerful Kaia Kanepi and make the 15th US Open quarterfinal showing of her illustrious career.