Gréta Arn (born April 13, 1979; in Budapest, Hungary) is a professional tennis player from Hungary, who previously represented Germany. Arn turned professional 1997.
In her career she won four ITF titles in singles and in doubles; she also won her first WTA title in Estoril, in Portugal, on May 6, 2007. Her career high on WTA rankings was No.81, on July 22, 2002.
Having played for Germany with dual Hungarian citizenship for 9 years, she chose for the 2008 Fed Cup to compete for Hungary alongside Ágnes Szávay. She also chose to play for her nation of birth full time.
She won her first WTA Tour title as a qualifier ranked No.176 in the world, becoming lowest ranked and first qualifier to win a WTA Tour event in 2007. In the Tier IV 2007 Estoril Open final she defeated teenager Victoria Azarenka 2-6, 6-1, 7-6 (3); saving two matchpoints at 4-5 in third set.
