Petra Kvitova of the Czech Republic in action against Agnieszka Radwanska of Poland during their singles final match of the BNP Paribas WTA Finals 2015 held at the indoor stadium in Singapore, 01 November 2015. EPA/WALLACE WOON

Agnieszka Radwanska of Poland in action against Petra Kvitova of the Czech Republic during their singles final match of the BNP Paribas WTA Finals 2015 held at the indoor stadium in Singapore, 01 November 2015. EPA/WALLACE WOON

Agnieszka Radwanska of Poland celebrates with the Billie Jean King Trophy after defeating Petra Kvitova of the Czech Republic in their singles final match at the BNP Paribas WTA Finals 2015 held at the indoor stadium in Singapore, 01 November 2015. EPA/WALLACE WOON

Agnieszka Radwanska of Poland celebrates with the Billie Jean King Trophy after defeating Petra Kvitova of the Czech Republic in their singles final match at the BNP Paribas WTA Finals 2015 held at the indoor stadium in Singapore, 01 November 2015. EPA/WALLACE WOON

Agnieszka Radwanska of Poland holds the Billie Jean King Trophy while posing for photographers inside the Flower Dome at the Gardens by the Bay in Singapore, 02 November 2015. Radwanska won the BNP Paribas WTA Finals 2015 defeating Petra Kvitova of the Czech Republic in the singles finals. EPA/WALLACE WOON

It’s a WRAP! My 10th WTA Finals. Photo by Andrew Krasny via Facebook.