Xinyu Wang

Wang booked her ticket to her major debut at the 2018 Australian Open on 3 December 2017 in Zhuhai by winning the Asia-Pacific Wildcard Playoffs, coming back to edge out the Papua New Guinean No. 1, Abigail Tere-Apisah, in the final. Tere-Apisah was only two points away from victory when leading 5–3, 30–0 in the second set, looking to become the first player from Papua New Guinea to compete in a major main draw, when momentum shifted and Wang, demonstrating fearlessness for her age, won the next seven points, before going on to level the match. Wang eventually won the match in three sets, seizing the most crucial break with a splendid backhand passing shot in the ninth game, and then closed out the final set after saving four break points. "It's probably the most important day in my life so far," Wang said in the post-match news conference to CCTV Sports Channel, the official TV broadcaster of the Australian Open in China. At the age of 16, she was the youngest Chinese player to make a Grand Slam championship main draw. At the 2018 Australian Open, as the second youngest competitor in the main draw (just older than 15-year-old Marta Kostyuk), Wang lost her debut match at a major to Alizé Cornet, in straight sets. But going through to the girls' doubles final with her partner Liang En-shuo from Taiwan, Wang claimed the title in a close match against Violet Apisah of Papua New Guinea (Abigail Tere-Apisah's niece) and Lulu Sun, a New Zealand-born Swiss player of Chinese descent.

She made her Premier Mandatory debut at the 2019 Miami Open as a wildcard.

In September, Wang reached her first WTA Tour-level final at the Jiangxi International Open in the doubles event. Alongside Zhu Lin, she defeated compatriots Peng Shuai and Zhang Shuai.

She made her debut in the top 100, after reaching the quarterfinal of the Ladies Linz at world No. 99 in the year-end rankings, on 15 November 2021. However, she lost to the eventual champion, Alison Riske.

Wang won her first Grand Slam match of her career which was against Ann Li and was defeated in the second round at the Australian Open by world No. 2, Aryna Sabalenka.

She made her top 100 debut in doubles, on 25 April 2022, and top 75 in singles, on 16 May 2022, after winning her biggest title on the ITF World Tennis Tour at the 100k La Bisbal d'Emporda in Spain.

Partnering Hsieh Su-wei at the French Open, using protected ranking, she reached the final for the first time at a major. En-route the pair upset defending champion Kristina Mladenovic, who was partnering Zhang Shuai this year, in the second round, and fifth seeds Desirae Krawczyk and Demi Schuurs in the third round. In the quarterfinals, they beat Veronika Kudermetova and Liudmila Samsonova, and in the semifinals sixth seeds Nicole Melichar-Martinez and Ellen Perez to advance to their first final as a pair. There, they defeated Leylah Fernandez and Taylor Townsend to win the title, their first title as a team and the first Grand Slam title for Wang Xinyu.

At the US Open, she reached the fourth round in singles for the first time at a major.

At the China Open, she reached the third round at the WTA 1000 level for the second time by defeating 11th seed Daria Kasatkina. As a result, she reached the top 35 in the WTA rankings on 9 October 2023.

Using protected ranking on her debut, she reached in doubles, the second round at the Miami Open and the quarterfinals at the Madrid Open with Zheng Saisai.^[] Also on her debut, she reached the semifinals for the first time at the next WTA 1000, the Italian Open, again with Zheng, upsetting top-seeded pair Hsieh/Mertens to face third seeds Gauff and Routliffe for a spot in the final. Wang and Zheng won the doubles at the Berlin Open.

At Wimbledon, she defeated world No. 5, Jessica Pegula, in the second round to record her first win over a top-10 ranked player. Wang went on to reach the fourth round before she lost to 21st seed Elina Svitolina. She won the silver medal with Zhang Zhizhen in mixed doubles at the Paris Summer Olympics.

At the 2024 Wuhan Open, she reached her first singles semifinal at the WTA 1000-level defeating second seed and world No. 3, Jessica Pegula, in the round of 16, her second top five win in three months, and Ekaterina Alexandrova in the quarterfinals. The semifinal between her and compatriot Zheng Qinwen was the first All-Chinese showdown at this level and guaranteed a first-time finalist from China at the tournament.