Anett Kontaveit’s sensational late season form continued as she rolled past Barbora Krejcikova 6-3, 6-4 while Karolina Pliskova outlasted Garbine Muguruza 4-6, 6-2, 7-6 (8-6) as the WTA Finals got underway in Guadalajara on Wednesday.

The 25-year-old Estonian Kontaveit captured the 30-minute first set with an ace out wide and sealed the win when an error-prone Krejcikova sent a backhand into the net on match point.

Kontaveit, who was the final singles player to secure her place in the eight-player tournament, claimed four WTA titles this year to surge to world No. 8 and has now won 11 straight matches.

In a battle of former world number ones, Pliskova overcame a slow start to see off Muguruza under the lights in the night session. After dropping the first set, Pliskova broke Muguruza’s serve to end an eight-minute game and take a 2-0 second set lead she would not relinquish.

In the third set, Muguruza saved two match points on her serve at 5-4. She held her nerve to ultimately force a tie-breaker but eventually lost.