[5] Coming from Saint-Brieuc-de-Mauron in Brittany, she competed for France until her marriage in Turkey in February 2015.

She then changed her name from Ketty Mathé to Kayra Sayit, and began to compete for Turkey after acquiring the Turkish citizenship.

[9] In 2016, Özdemir won the gold medal at the Tbilisi Grand Prix,[10] and at the European Championships in Kazan, Russia.

[11] In 2021, Özdemir won one of the bronze medals in her event at the 2021 World Masters held in Doha, Qatar.

[15] Özdemir won the gold medal in the women's +78 kg event at the 2022 Mediterranean Games held in Oran, Algeria.