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Grace Sari Ysidora (born 11 May 1993) is an Indonesian professional tennis player. She made her debut as a professional in 2008, aged 15, at an ITF tournament in Jakarta. In that year, she reached the final of the women's doubles of the inaugural 2008 Garuda Indonesia Tennis Masters, partnered by Septi Mende. They were defeated by Ayu-Fani Damayanti and Liza Andriyani.
She first won an ITF event in 2011. In that year, she also won two medals at the 2011 Southeast Asian Games in Palembang: the bronze in the mixed doubles event, and the silver in the team event.
