Belarus' Aryna Sabalenka, her goddaughter Nicole, and Australia's Nick Kyrgios celebrate with trophies after the match. PHOTO: REUTERS Nick Kyrgios has beat Aryna Sabalenka 6‑3 6‑3 in a "Battle of the Sexes" exhibition match billed as a modern take on Billie Jean King's famous win over Bobby Riggs over 50 years ago, but one that ignited controversy over its relevance and meaning.