Known as a clay-court specialist,[2][3] Errani won three titles on clay going into the 2012 French Open, where she reached the finals in both the singles (becoming the second Italian woman to ever reach a Grand Slam singles final, with Francesca Schiavone being the first at the 2010 French Open) and doubles tournaments, winning the doubles title with her partner Roberta Vinci.

By winning the 2014 Wimbledon Women's Doubles title, Errani and Vinci became only the fifth pair in tennis history to complete a Career Grand Slam.

[citation needed] The first WTA Tour title of her career was in the Internazionali Femminili di Palermo where she defeated Mariya Koryttseva in the final.

At the beginning of 2012, Errani decided to change her racquet, switching from Wilson to Babolat, opting for a heavier and slightly longer model than the last, allowing for more power and better reach.

[9] At the Australian Open Errani advanced to her first Grand Slam quarterfinals, defeating Valeria Savinykh, Nadia Petrova, Sorana Cîrstea, and Zheng Jie en route, before losing to Petra Kvitová.

In the Fed Cup semifinals against the Czech Republic, Errani lost to Petra Kvitová, but beat Andrea Hlaváčková, with Italy losing the tie.

En route she defeated Casey Dellacqua, Melanie Oudin, and former French Open winners Ana Ivanovic and Svetlana Kuznetsova.

[citation needed] She was the fifth tennis player - on current format - to qualify for the WTA Finals in both singles and doubles, after Svetlana Kuznetsova in 2003, Kim Clijsters in 2004 and the Williams sisters in 2009.

In the doubles tournament, Errani, partnering with Vinci, won her third Grand Slam title, beating Australian wildcards Ashleigh Barty and Casey Dellacqua in the final.

[citation needed] At the Madrid Open, where, defeating Urszula Radwańska, Sorana Cîrstea, Varvara Lepchenko, and Ekaterina Makarova, she reached the semifinals, her first in a WTA Premier Mandatory, where she was beaten by Serena Williams in straight sets.

In doubles, with Roberta Vinci, she reached her fifth Grand Slam final, losing to the Russian team of Ekaterina Makarova and Elena Vesnina.

[citation needed] Errani competed in the Sydney International, where she reached the quarterfinals in singles, and was a finalist in doubles with Roberta Vinci, losing to Tímea Babos and Lucie Šafářová.

In the doubles, she played alongside Roberta Vinci; they reached their third consecutive final, falling to Hsieh Su-wei and Peng Shuai in straight sets.

[25] At the Dubai Tennis Championships in 2016, Errani reached the finals and defeated Barbora Strýcová to earn the biggest singles title of her career.

[citation needed] After contending with injuries during the early part of the year, Errani had a solid result by reaching the semifinals at the Morocco Open.

Errani claimed that she likely ingested letrozole by "accidentally consuming her mother's anti-cancer medication Femara" in home-made tortellini while visiting family.

[34] Both Errani and Italian anti-doping agency Nado Italia appealed sections of the suspension to the Court of Arbitration for Sport (CAS).

[36] Upon returning to Grand Slam tennis Errani was knocked out of the 2020 Australian Open at the first hurdle in the qualifying rounds by Anna Kalinskaya.

After the match, which Errani lost, it was reported she shouted abuse at opponent Kiki Bertens who was being taken off the court in a wheelchair due to injury.

[citation needed] Partnering with Irina Bara, Errani won the doubles title at the 2022 WTA 125 Argentina Open, defeating Jang Su-jeong and You Xiaodi in the final.

[40][41] Partnering Léolia Jeanjean, Errani won doubles title at the WTA 125 2023 MundoTenis Open in Brazil, defeating Julia Lohoff and Conny Perrin in the final.

[43] Playing with Jasmine Paolini, she won the doubles title at the 2024 Linz Open, defeating top seeds Nicole Melichar-Martinez and Ellen Perez in a final which went to a deciding champions tiebreak.

[44] At the 2024 Transylvania Open, Errani defeated Caty McNally in straight sets to notch her first WTA tour-level win on indoor hard courts since Luxembourg 2015.

[50] At the same tournament, she received a wildcard for the singles main draw for a second consecutive year and defeated Amanda Anisimova, who was using protected ranking.

The Italian duo followed up their success in Rome with a runner-up finish at the 2024 French Open, losing the final to Coco Gauff and Katerina Siniakova.

[51] At the Paris Olympics Errani and Paolini won the gold medal in doubles defeating AIN (Individual neutral athletes) Mirra Andreeva and Diana Shnaider.

[60] At the 2024 Billie Jean King Cup finals in Spain, Errani teamed with Jasmine Paolini to defeat Shuko Aoyama and Eri Hozumi in the deciding doubles match as Italy won their quarterfinal tie against Japan.

[61][62] Italy faced Poland in the semifinals and Errani again combined again with Jasmine Paolini to defeat Katarzyna Kawa and Iga Świątek in the decivisve doubles and secure a place in the final.

[66][67] Errani and Jasmine Paolini won their third WTA 1000 doubles title together at the Qatar Open, defeating Jiang Xinyu and Wu Fang-hsien in the final.

[2] Having won multiple titles on clay, she is widely recognized as a clay-court specialist and is known for her use of strategy on the surface, including her tendency to position herself well and to return serves early.