Anett Kontaveit will face two-time grand slam champion Garbine Muguruza in the WTA Finals decider after outlasting Maria Sakkari 6-1 3-6 6-3.

Kontaveit – the most in-form player on the WTA Tour – was pushed by fourth seed Sakkari in Tuesday's semi-final at the year-ending championship but fought hard to reach the biggest final of her career.

Having entered the Guadalajara showpiece on the back of three titles and 19 wins in 20 matches, eighth-seeded Estonian star Kontaveit maintained her momentum with her Tour-leading 48th win of the season.

Kontaveit will now go head-to-head with former world number one and sixth seed Muguruza in a repeat of their group-stage meeting, which the latter claimed in straight sets.

The first set was straightforward for Kontaveit, who broke twice as she dominated on serve against Greece's Sakkari.

But Sakkari – who trumped Aryna Sabalenka to reach the semi-finals at the expense of the top seed – remained composed, breaking at the end of the second set to force a decider.

After trading breaks early in the third, Kontaveit eventually prevailed as she looks to avenge her loss to Muguruza in Wednesday's title showdown.

Kontaveit is now a perfect 7-0 in semi-finals this year and the 25-year-old WTA Finals debutant stands on the cusp of a third straight trophy and fifth overall, which would tie world number one Ash Barty for the most this year.

 

WINNERS/UNFORCED ERRORS 

Kontaveit – 26/33
Sakkari – 15/32

ACES/DOUBLE FAULTS 

Kontaveit – 6/3
Sakkari – 9/3

BREAK POINTS WON 

Kontaveit – 4/8
Sakkari – 2/2