Cristina Bucsa

Bucșa won her first ITF Circuit titles in both singles and doubles in 2017. In May 2017, she won the 15k event in Santarém, defeating Valeria Savinykh in the final. In November 2017, she and doubles partner Yana Sizikova won the 2017 Open de Valencia, defeating Georgina García Pérez and Andrea Gámiz in the final.

She entered the qualifiers of the 2019 Wimbledon Championships, but lost to Samantha Murray Sharan in the second round. One month later, she won the Open Araba en Femenino with a win over Shalimar Talbi in the final.

She entered the singles main draw of a major for the first time at the 2021 US Open, after defeating Kateryna Baindl, Elvina Kalieva, and Océane Dodin in the qualifying competition.

In 2022, she qualified for the Australian Open and the French Open, but lost in the first round of both. Later that year, Bucsa also qualified for her first WTA 1000 event at the Canadian Open. At the US Open, she recorded her first win at a Grand Slam by defeating Kaja Juvan, but lost to 19th seed Danielle Collins in the second round. She and Weronika Falkowska won the doubles title at the Andorrà Open, defeating Angelina Gabueva and Anastasia Zakharova in the final.

Bucșa reached the top 100 in the singles WTA rankings on 16 January 2023. She qualified for the Australian Open and reached the third round recording her first two wins at this major tournament over Eva Lys and Bianca Andreescu. She then lost to world No. 1, Iga Świątek, in the third round. This was her best result at a Grand Slam tournament thus far. At the Lyon Open, she won her first WTA doubles title with Bibiane Schoofs. At the Indian Wells Open, she reached the second round of a WTA 1000 tournament for the first time in her career, defeating Katie Swan as a qualifier.

She made her main-draw debut at Wimbledon and defeated Kamilla Rakhimova for her first win at this major tournament, before losing to fourth-seeded Jessica Pegula in the second round. She and Alena Fomina-Klotz won the doubles title at the Contrexéville Open, defeating Amina Anshba and Anastasia Dețiuc in the final.

She entered the main draw of the Canadian Open as a lucky loser, but lost to Petra Martić in the first round. On her debut at th Cincinnati Open, she upset 13th seed Belinda Bencic to reach the second round. At the Guadalajara Open, she double bageled former top-ten player Kristina Mladenovic. In mid-December, she won her first WTA 125 singles title at Limoges, defeating Elsa Jacquemot in the final. She also won the doubles title there, partnering Yana Sizikova and defeating Oksana Kalashnikova and Maia Lumsden in the final.

She began her season by reaching the doubles semifinal of the Brisbane International with Alexandra Panova. She qualified for the Adelaide International as a lucky loser and defeated Jasmine Paolini in the first round, before losing to top seed Elena Rybakina in the second. Following this, she reached a new career-high singles ranking of No. 56, on 15 January 2024. At the Australian Open, she reached the doubles quarterfinals with Panova. As a result, she reached the top 50 in doubles on 29 January 2024. In Abu Dhabi, she reached the quarterfinals as a lucky loser, but once again lost to top seed Rybakina. In Doha, she and partner Monica Niculescu reached the doubles quarterfinal. She then made her debut at the Dubai Championships as a lucky loser by replacing Ons Jabeur in the second round, but lost to eventual finalist Anna Kalinskaya.

Seeded fourth in singles in Bogotá, she defeated You Xiaodi and Jule Niemeier, before losing to her doubles partner Kamilla Rakhimova in the quarterfinals. She and Rakhimova later won the doubles title in Bogotá by defeating the third-seeded team of Anna Bondár and Irina Khromacheva in the final. In Madrid, Bucșa defeated Harriet Dart, before losing to 10th seed Daria Kasatkina in the second round. Seeded eighth in doubles, she and compatriot Sara Sorribes Tormo won the title defeating Barbora Krejčíková and Laura Siegemund in the final, becoming the first all-Spanish doubles team to win in Madrid. This was Bucșa's first WTA 1000 title, which brought her to a career-high doubles ranking of No. 27 on 6 May 2024. The following month, Bucșa won her first WTA 500 doubles title in Strasbourg, partnering Niculescu and defeating Asia Muhammad and Aldila Sutjiadi in the final. En route to the title, Bucșa and Niculescu upset the second-seeded team of Demi Schuurs and Luisa Stefani in the semifinal.

In May, she recorded her first French Open singles win against qualifier Yuliia Starodubtseva in the first round, before losing to Elisabetta Cocciaretto in the second. In doubles, she and Niculescu upset the 14th-seeded team of Sofia Kenin and Bethanie Mattek-Sands in the second round. Following her French Open doubles run, she achieved a career-high doubles ranking of No. 19 and surpassed Sorribes Tormo as the top Spanish female doubles player on 10 June 2024.

She made her Olympic debut in Paris, where she reached the second round in singles with a win over Petra Martić. Seeded eighth in doubles with Sorribes Tormo, they won the bronze medal. Following her bronze medal win, she became the first female and first athlete to be commemorated on the Paseo Torre de la Vega in her hometown of Torrelavega. At the China Open, she reached the fourth round of a WTA 1000 tournament for the first time in her career, defeating wildcard entrant Yao Xinxin, 11th seed Liudmila Samsonova and 24th seed Elise Mertens. Her run was ended by Karolína Muchová.

In March, Bucșa and Miyu Kato reached the doubles final of the Miami Open, but lost to Mirra Andreeva and Diana Shnaider. En route, they upset the top seeds and world No. 1 and No. 2 players, Kateřina Siniaková and Taylor Townsend.

She defended her doubles title at the Copa Colsanitas with Sara Sorribes Tormo, defeating Laura Pigossi and Irina Bara in the final.

At Wimbledon, Bucșa defeated Anca Todoni and 22nd seed Donna Vekić to reach the third round at the grass-court major for the first time, at which point her run was ended by lucky loser Solana Sierra.

Teaming with Nicole Melichar-Martinez, she won the doubles title at the Monterrey Open, overcoming Guo Hanyu and Alexandra Panova in the final.

Wins over qualifier Claire Liu, Alexandra Eala and 19th seed Elise Mertens saw Bucșa make it through to the fourth round of a major for the first time at the US Open, where she lost to world No. 1 and eventual champion, Aryna Sabalenka.

In October at the Hong Kong Open, Bucșa defeated qualifier Ma Yexin and eighth seed Emiliana Arango to reach the quarterfinals, where she was given a walkover when her opponent, top seed Belinda Bencic, withdrew from the tournament due to a thigh injury. In the semifinals, she overcame fifth seed Maya Joint to make it into her first tour singles final, which she lost to third seed Victoria Mboko, in three sets. Despite her defeat, Bucșa reached a new career-high singles ranking of world No. 54 on 3 November 2025.