The final of the WTA Finals in Singapore will feature the two players who have bean undefeated in their respective paths to the ultimate match.
Semi Finals
Elina Svitolina (6) v Kiki Bertens (8)
After three service holds in the opening set, Svitolina broke the Bertens serve for 3-1.
Bertens, with great width and depth from her forehand, broke back immediately, and consolidated. 3-3 after a winning drop shot.
At 4-5 and 40-15, Bertens appeared ready to level again, but Svitolina rattled off four straight points and held a set point.
However rallying to the Dutch forehand is dangerous, and Bertens was able to escape the set point and eventually hold.
At 5-6, Bertens contributed a number of errors from the baseline, and on set point double faulted. Svitolina led 7-5
After a backhand failure towards the end of set one, Bertens resurrected the shot and used it on break point in game one of set two.
A fast consolidation and Kiki led 2-0.
The pair held serve for the next four games, Bertens doing it easier. The seventh game featured a 29 shot rally, finished with a Ukrainian backhand winner down the line.
At 30-30, Bertens served an ace, and a forehand confirmed a 5-3 lead.
Svitolina saved a set point in the ninth game, and saved three more when Bertens served for the set. Errors cost the Dutch player and it was 5-5.
After nine straight points, Elina led 6-5, and three successive Bertens winners ensured a tie break.
Svitolina led 2-0, but lost four consecutive points in the tie break. At 4-5 Elina’s superb backhand levelled things. Bertens steadied, winning the final two points, and the set 7-6(5)
Svitolina, with speed and great defence, broke Bertens in the opening game of set three, only to see her own serve lost on the fourth try, in a thirteen minute second game.
Bertens used a stunning drop shot to save a break point, but then two backhand errors cost her, and a third successive dropped serve had Svitolina ahead 2-1.
No more break points as the players reached 4-3, Svitolina next to serve, the sixth and seventh games served to love.
Serving for a finals berth, Svitolina defended a break point grimly as Bertens pounded her with backhands. It was saved, as was another, after a lengthy rally.
Finally, Elina Svitolina held serve to win an entertaining semi final 7-5 6-7(5) 6-4
Sloane Stephens (5) v Karolina Pliskova (7)
The two had met three times previously, Stephens winning in 2012 and 2015, but Pliskova successful this year on clay in Madrid.
It was Pliskova making the running from the outset, holding serve from deuce, then breaking the Stephens serve with confident baseline shots.
Stephens defended well and earned a break point, which was saved by Pliskova, who was using all the court to her advantage.
The power and poise with which Pliskova was playing drew another break point from Stephens, and the American double faulted.
4-0 became 5-0 quickly, and Stephens dropped serve a third time to give Karolina Pliskova a remarkable 6-0 lead.
Set two began with no mercy for the American - Pliskova saved a break point in the opening game, then hit a set of brilliant backhands to crack the Stephens serve and win an eighth successive game. 2-0.
Leading 40-15, Pliskova let Stephens off the hook, and lost serve.
This was enough to let Sloane back in the match. She staved off a break point, then a forehand winner and ace sealed a service game for 2-2.
Three breaks of serve followed, and Stephens held the lead 4-3.
At 5-4, Stephens comfortably served out the set and the match was even, incredible after Pliskova led 6-0 2-0.
Stephens kept up the momentum, breaking Pliskova in the opening game of the decider. The Czech player broke back, but Stephens was relentless, and her consistent defence led to a break point in the fifth game. Pliskova double faulted and trailed 1-4.
Holding to love, then breaking Pliskova a third time, Sloane Stephens won incredibly 0-6 6-4 6-1