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Denmark's Caroline Wozniacki (2-R) poses for a picture on stage after losing against Karolina Pliskova of the Czech Republic during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

Denmark's Caroline Wozniacki (2-R) poses for a picture on stage after losing against Karolina Pliskova of the Czech Republic during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha.
Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR        (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

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Karolina Pliskova (L) of the Czech Republic and Denmark's Caroline Wozniacki pose on stage following their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

Karolina Pliskova (L) of the Czech Republic and Denmark's Caroline Wozniacki pose on stage following their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha.
Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR        (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

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Karolina Pliskova (Top Left) of the Czech Republic and Denmark's Caroline Wozniacki pose on stage following their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

Karolina Pliskova (Top Left) of the Czech Republic and Denmark's Caroline Wozniacki pose on stage following their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha.
Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title. / AFP / KARIM JAAFAR        (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

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Karolina Pliskova of the Czech Republic reacts after winning against Denmark's Caroline Wozniacki during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. / AFP / KARIM JAAFAR (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

Karolina Pliskova of the Czech Republic reacts after winning against Denmark's Caroline Wozniacki during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. / AFP / KARIM JAAFAR        (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

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Karolina Pliskova (L) of the Czech Republic shakes hands with Denmark's Caroline Wozniacki after winning against her during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. / AFP / KARIM JAAFAR (Photo credit should read KARIM JAAFAR/AFP/Getty Images)

Karolina Pliskova (L) of the Czech Republic shakes hands with Denmark's Caroline Wozniacki after winning against her during their final tennis match in the WTA Qatar Total Open on February 18, 2017, in Doha. / AFP / KARIM JAAFAR        (Photo credit should read KARIM JAAFAR/AFP/Getty Images)