Garbine Muguruza continued her dream debut at the WTA Finals by completing round robin play with a perfect 3-0 record to advance to the semi-finals after a hard fought 6-4 4-6 7-5 victory over Petra Kvitova yesterday.

By topping the White Group, the Spaniard set up a showdown against Poland’s Agnieszka Radwanska while Kvitova (1-2) received a huge boost from her Czech Fed Cup team-mate Lucie Safarova (1-2) who beat Ange-lique Kerber to help her advance.

Kerber (1-2) only needed to win a set in yesterday’s second match to move on but the already-eliminated Safarova (1-2) found her best form of the week to blast the German off the court and out of the eight-woman event with a 6-4 6-3 win.

Kerber’s loss was Kvitova’s gain and the double Wimbledon champion claimed second place in the group courtesy of sets won to book a last-four berth against Red Group winner Maria Sharapova.

“That’s teamwork,” Safarova said of the win that sent her compatriot through to the semis.

“I am happy for her that she went through and I am happy for my win today as well.”

While her rivals were left scratching their heads and fretting over the various permutations, Muguruza was spared the agony of relying on others by claiming a third straight triumph.

“It’s amazing to reach the semi-finals,” Wimbledon finalist Muguruza said in a courtside interview.

“To be here is a great payoff for an amazing year and hopefully I can continue winning and playing like this.”