Serena Williams might aspire to be the queen of women's tennis, but for now she's merely aiming to be a Toyota Princess.

On Friday, Williams clashed with another princess of tennis, Jelena Dokic, in the quarterfinals of the Toyota Princess Cup at Tokyo's Ariake Colosseum.

It was a battle royale that felt more like a final. Dokic played tough, solid tennis; Williams played even tougher. After all, she was wearing purple.