Victoria Azarenka at centre of ugly controversy ahead of US Open - Yahoo Sport Australia

Marta Kostyuk has taken aim at her rival before a charity event at the US Open. Find out what happened here.

Marta Kostyuk (pictured left) won't take part in the Ukraine charity event and hit out at the US Open organisers because of Belarusian Victoria Azarenka's (pictured right) involvement. (Getty Images)… [+3565 chars]

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