Sara Errani was born in Bologna, Italy and first held a tennis racket at age five. She speaks both Italian and English and admits to being a timid and happy person. She has a brother, Davide who plays soccer. She has great admiration for David Ferrer for his power shots.
The 21-year old played her first tournament of her professional career in 2002 at the ITF Circuit. She continued playing until 2004 but fell in the qualifying for both Palermo and Rome. In 2005, she won her first ITF Circuit singles title in Melilla, Spain as well as two doubles title in Mellilla and Sevilla, Spain with partner Martinez Sanchez.
In 2006, she played her first WTA Tour main draw event in Bogota finishing in the second round. She earned her first quarterfinal singles finish at Budapest defeating Szavay along the way but lost to Krajicek. She was unable to qualify for the Wimbledon and US Open this year. Her doubles career flourished during this time with a win at Cuneo, Italy with Knapp.
In 2007, Errani won one ITF singles title in Galatina, Italy and was runner up in Acapulco, Palermo and Bali. In Bali, she defeated fourth-seeded Medina Garrigues but lost to eventual winner Davenport. She entered the Top 100 jumping from No. 102 to No. 91. Qualifying for the US Open, Errani managed to reach the second round but fell at Bogota.
In 2008, she got to the quarterfinals in Auckland defeating No. 4 seeded Krajicek but lost to Davenport. She reached the first round of the Australian Open and the quarterfinals in Bogota. Errani also performed well in Miami getting to the third round. Her best finish of the year was in July winning her first Tour career singles title in Palermo as well as a doubles title with Llagostera Vives.