Controversial tennis star Nick Kyrgios has had his say on candid comments made by a journalist on the appearance of Wimbledon champion Barbora Krejcikova.

Barbora Krejcikova criticises a journalist's "unprofessional commentary" after he made a remark about her appearance on air.

Journalist Jon Wertheim, seemingly unaware that he was on air, made a comment about Barbora Krejcikova's forehead.

Barbora Krejcikova? Look at the forehead when Krejcikova and Zheng take the court.” You might have heard about the recent comments made on Tennis Channel during the WTA Finals coverage that focused on my appearance rather than my performance.