Ukraine's Marta Kostyuka refused to shake hands with Belarusian Victoria Azarenka after losing in the 2nd round of the US Open. Ukrainian Elina Svitolina, the wife of Gaël Monfils who made her return to competition in April after a year of absence following the birth of her daughter to the Belarusian Aryna Sabalenka.
The two players have been pitted against each other twice (one win each) Daria Kasatkina was copiously whistled this Sunday by the public of the Suzanne Lenglen court during her match.