[16] Raducanu started playing tennis at the age of five,[17] while also participating in various other sports and activities as a child, such as basketball, golf, karting, motocross, skiing, horse riding, and ballet.

[25] Raducanu defeated Diana Khodan of Ukraine in the final at Chandigarh, held at the Lawn Tennis Association Stadium, where she won in straight sets.

[24] She won two additional titles the following month, four in total for 2018 and seven over the course of her junior career, with wins at the Biotehnos Cup and Šiauliai Open Grade-2 events.

[60] In the main draw, she defeated Stefanie Vögele, Zhang Shuai, Sara Sorribes Tormo, Shelby Rogers, Belinda Bencic, Maria Sakkari, and Leylah Fernandez to win the US Open.

[61] On her way to the title she advanced to the semi-finals without dropping a set, and became the fifth player in the open era to reach a grand slam semifinal as a qualifier.

[59] Raducanu received congratulatory messages from a number of notable figures, including Elizabeth II and Catherine, Duchess of Cambridge.

19, Raducanu participated in an exhibition match against Elena-Gabriela Ruse at the Champions Tennis event in the Royal Albert Hall on 28 November 2021, and won in two sets.

[102] After only five months of working together, Raducanu announced a split from her coach Torben Beltz to use a new training model with the Lawn Tennis Association (LTA) supporting in the interim.

[104] This change included the addition of LTA coach Louis Cayer as a consultant on her technique, particularly serves, having worked together since early April.

[126] At the Korea Open, Raducanu advanced to her first semifinal of the season where she retired in the third set to top seed Jeļena Ostapenko due to an injury.

[138] Following an over month-long recovery and training session after Australia, the planned return to tour at the ATX Open was cut short after withdrawing due to tonsillitis.

[143] The clay-court season began with a return to the Stuttgart Open and a first round lopsided loss to Jeļena Ostapenko, having reached the quarterfinals a year prior.

[90] After undergoing surgery on her ankle and both wrists to remove carpal bosses, she skipped the remainder of the clay and grass court seasons with a possible return to tour after the summer.

Raducanu's recovery included working with different types of tennis balls to regain her form, while lacking a dedicated coach or team.

[153] In the week before the Australian Open, Raducanu was set to play two exhibition tournaments, she later withdrew from both of them, citing soreness; it was indicated this was a precaution rather than a new injury.

[156] Raducanu's season continued with a straight-sets victory against Marie Bouzková at the Abu Dhabi Open, losing to Ons Jabeur in the second round.

[158] She did not play until the Indian Wells Open where she reached the third round for the first time since the 2023 edition of the event, beating qualifier Rebeka Masarova and 30th seed Dayana Yastremska who retired four games into the first set.

[160] Raducanu received a wildcard into the main draw of the Miami Open, but withdrew before her scheduled first round match against Wang Xiyu, citing a lower back injury.

[162] She defeated Caroline Garcia and Diane Parry to help Great Britain qualify for the Billie Jean King Cup finals.

[168] Raducanu entered the Madrid Open as a wildcard, and lost to qualifier María Lourdes Carlé in the first round in straight sets, citing "physical and emotional exhaustion".

[178] In her first tournament after Wimbledon, Raducanu reached the quarterfinals at the Washington Open with wins over eighth seed Elise Martens[179] and Peyton Stearns[180] before losing to Paula Badosa in three sets.

Raducanu made her return to competitive action in November at the Billie Jean King Cup finals in Spain, where she defeated Jule Niemeier in straight sets in Great Britain's first-round win over Germany.

[199] It was announced on 24 January, that Raducanu had stopped working with coach Nick Cavaday due to issues with his health.

[204] She finally ended her run of defeats at the Dubai Tennis Championships, where she entered as a wildcard once more and overcame Maria Sakkari in the first round.

She keeps opponents deep in the court by taking the ball early, and hitting hard down the line, whilst attacking short second serves by going for return winners.

Raducanu is comfortable on all surfaces, although she has stated that she prefers hard courts, where she won her maiden major title.

[223] Raducanu signed with sports agency IMG while on the junior circuit and has been represented by executive Max Eisenbud.

[235][236] Raducanu added to her portfolio in June 2023 with American digital media platform AirWayz, where she offers online tennis coaching for $2000 per session.

[240] Raducanu won Sportswoman of the Year and the Peter Wilson Trophy for international newcomer in December 2021, awarded by the Sports Journalists' Association.

[242] On 19 December 2021, Raducanu was named the BBC Sports Personality of the Year, becoming the first female tennis player to win the trophy since Virginia Wade in 1977.