From 27 august to 9 september 2018
US Open
New York / Grand Slam / 11,800,000 $
Osaka N
From 10 september to 16 september 2018
Hiroshima
Hiroshima / WTA International / 250,000 $
Hsieh S
Québec
Qu / WTA International / 226,750 $
Parmentier P
From 17 september to 23 september 2018
Tokyo
Tokyo / WTA Premier / 890,100 $
Pliskova K
Séoul
S / WTA International / 226,750 $
Bertens K
Guangzhou
Guangzhou / WTA International / 226,750 $
Wang Q
From 23 september to 29 september 2018
Wuhan
Wuhan / WTA Premier / 2,365,250 $
Sabalenka A
From 24 september to 29 september 2018
Tashkent
Tashkent / WTA International / 226,750 $
Betova M
From 29 september to 7 oktoober 2018
Pékin
P / WTA Premier / 6,381,679 $
Wozniacki C
Madrid 
Madrid 
05:19 
vs 
vs 
Titles 2018