Agnieszka Radwanska eliminated Garbine Muguruza from the WTA Finals with a 7-6 (7-1) 6-3 victory in their White Group encounter on Wednesday.
Both players squandered match points in their opening encounters, but defending champion Radwanska showed greater composure to come out on top this time with a controlled display that sent Svetlana Kuznetsova into the semi-finals.
Muguruza played aggressively, but committed too many errors, with the Pole defending well to set-up a shootout for the semi-finals in her final match against Karolina Pliskova.
The Spaniard ended a run of four successive breaks to hold for 4-4, but, after Radwanska dropped her serve for the third straight game, she was unable to see out the opening set.
Radwanska was irrepressible in the ensuing tie-break, winning six straight points, the last with a low cross-court backhand, to take the advantage.
Muguruza chased the match, but after moving 2-0 up in the second set Radwanska began to repel everything she threw at her. The world number six was left frustrated when a wide forehand volley put the Pole in control of the second set.
A hold to love and a classy final game saw Radwanska complete the victory, replicating her triumph over the Spaniard in the last four of the 2015 edition.
Agnieszka Radwanska  bt Garbine Muguruza  7-6 (7-1) 6-3
Radwanska - 17
Muguruza - 27
Radwanska - 4
Muguruza - 3
BREAK POINTS WON
Radwanska - 6/10
Muguruza - 4/5
FIRST SERVE PERCENTAGE
Radwanska - 54
Muguruza - 68
PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Radwanska - 72/48
Muguruza - 48/46
Radwanska - 72
Muguruza - 56