Tsvetana Kirilova Pironkova (Bulgarian: Цветана Кирилова Пиронкова) (born 13 September 1987) is a female Bulgarian tennis player. She was born and lives in Plovdiv, Bulgaria. Pironkova is right-handed and plays with a two-handed backhand. She achieved her career high of world no. 31 on 13 September 2010. She is best known for defeating Venus Williams three times at Grand Slam tournaments. She is currently the Bulgarian No. 1 and has won six ITF titles in her career.
Pironkova was born in 1987 to Kiril Enchev Pironkov, a former canoeing champion and Radosveta Chinkova Nikolova, a former swimming champion. She started playing tennis at the age of 4, when her father Kiril introduced her to the game. At the age of six, she started playing in junior tournaments in Bulgaria. Kiril later became her coach.
In 2001, Pironkova won the Atlantic Cup International Junior Tournament held in Bulgaria, and her career high in juniors was world no. 227 on 25 March 2002.