Tatiana Búa (Spanish pronunciation: [taˈtjana ˈβu.a];[a] born 19 January 1990) is an Argentine former professional tennis player.

Búa was born in Bragado, and made her WTA Tour debut at the 2014 Morocco Open, partnering Daniela Seguel in women's doubles.

[1] The South American pair won their first-round match against Nicole Clerico and Nikola Fraňková,[1] only to lose in the quarterfinals to the top seeds Darija Jurak and Megan Moulton-Levy.

[1] However, they reached their first final in Strasbourg the following month, losing to the three-time Grand Slam-finalist pairing of Ashleigh Barty and Casey Dellacqua.

[2] Playing for Argentina Fed Cup team, Búa has a win–loss record of 0–2.