BANGALORE, June 24 : Ukraine's Marta Kostyuk said taking a strong stance against Russia's invasion of her country had sharpened her sense of purpose on the tour, with the online backlash she receives deepening her resolve to keep speaking out. Kostyuk has been one of the most outspoken players on the war that began in 2022, repeatedly urging stronger recognition of the conflict while rejecting the idea of neutrality, saying players must stand by their values even while competing. The 23-year-