Championship Sunday In Cincy

Welcome back to the WTA Insider Live Blog, taking you inside all the action at the Western & Southern Open. It's finals day in Cincinnati, and the No.1 ranking is on the line in both singles and doubles. Co-No.1s Martina Hingis and Sania Mirza do battle alongside new partners CoCo Vandeweghe and Barbora Strycova; the winner will become sole No.1 on the WTA doubles rankings on Monday. Later, World No.2 Angelique Kerber must face Karolina Pliskova to grab a No.1 ranking of her own, which would cap off a stellar season for the German star. Stay tuned for more right here and on Twitter @WTA_Insider.