Kristyna has blond hair, a Maori-style tattoo, and likes Paulo Coelho novels. Karolina is more blonde, has two Maori-style tattoos and prefers Nicholas Sparks. A 1.83-metre left-hander, Kristyna won the junior singles title in England; Karolina, a 1.85-metre right-hander, claimed the same prize at the Australian Open.