Sheepish Sabalenka 'so sorry' for berating ball boy

ZHUHAI, Guangdong province - World No 12 Aryna Sabalenka has apologized for an on-court tantrum in which she shook an empty bottle in the direction of a ball boy before tossing it to the floor.

The big-hitting Belarusian faced criticism after footage of the episode during her quarterfinal loss to Wang Qiang at Beijing's China Open in early October was shared widely on social media.

But following a winning start at the WTA Elite Trophy in Zhuhai, the 20-year-old vowed to "never do it again".