A ninth Swiss Indoors Basel crown moves Roger Federer one away from his 100th career title.
Elina Svitolina will finish the year fourth in the rankings after lifting the Billie Jean King Trophy in Singapore.
Kei Nishikori and Kevin Anderson will do battle in Vienna on Sunday with two targets in mind.
Roger Federer overcame a tricky second set to record a comprehensive Swiss Indoors Basel semi-final win and edge towards a ninth title.
Elina Svitolina decided to "just go for it" in Singapore and she has been rewarded with four wins out of four.
Despite losing the first eight games of the semi-final, Sloane Stephens recovered to beat Karolina Pliskova at the WTA Finals.
Elina Svitolina produced another strong performance to make it four wins out of four in Singapore and reach the final.
Dominic Thiem was outclassed by Kei Nishikori at the Vienna Open, while Roger Federer was out of sorts but victorious.