2013

In 2013, she cracked the top 200 and started to play on the WTA Tour as well as the ITF Circuit. Kumkhum qualified for the Australian Open where she defeated Sofia Arvidsson in the first round, she was then beaten by Jamie Hampton. She played the Malaysian Open where she qualified for the tournament and reached the quarterfinals defeating Olivia Rogowska and Eleni Daniilidou en route before falling to Ayumi Morita in the quarterfinals, she also reached the semifinals of the tournament where she partnered with Erika Sema, falling to Janette Husárová and Zhang Shuai in the semifinals. In April 2013, she won the $25k event in Phuket, defeating Lisa Whybourn in the final.^[1]

She played the Roland Garros qualifying event where she defeated Zarina Diyas before falling to Sandra Záhlavová in the second qualifying round. She then suffered first-round losses at Nottingham, Birmingham and Wimbledon. Kumkhum's next event was the $100k event, President's Cup in Astana, where she defeated Eugeniya Pashkova, Noppawan Lertcheewakarn in the second round, and Ekaterina Bychkova in the quarterfinals before she lost to Nadiya Kichenok in the semifinals. In the doubles event, she and Tamarine Tanasugarn reached the final before falling to first seeds Nina Bratchikova and Valeria Solovyeva.

2014

At the Australian Open, Kumkhum, ranked No. 87 in the world, caused a major upset when she defeated former Wimbledon champion Petra Kvitová in the first round, in three sets. This was the first time ever that Kumkhum had faced a top-ten opponent in her career.^[2] She then suffered a first-round loss at the Pattaya Open from Julia Görges, in straight sets.

2017: First WTA Tour doubles final

She reached the final at the 2017 Korea Open, partnering fellow Thai Peangtarn Plipuech.

2018: Australian Open third round, two Challenger singles titles

Having qualified for the Australian Open, Kumkhum has progressed to the third round of a Grand Slam tournament for the first time. In the second round, she defeated former top-ten player Belinda Bencic, 6–1, 6–3.^[3]

2023: Second WTA Tour doubles final

She reached the semifinals at the home tournament in Hua Hin, Thailand as a wildcard player with Peangtarn Plipuech with the withdrawal of Anna Kalinskaya and Linda Fruhvirtová.

She reached the final of the 2023 Korea Open with Plipuech, five years after her first final at the same tournament.

Doubles: 2 (2 runner-ups)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Sep 2017	Korea Open, South Korea	International	Hard	Peangtarn Plipuech	Kiki Bertens Johanna Larsson	1–6, 4–6
Loss	0–2	Sep 2023	Korea Open, South Korea	WTA 250	Hard	Peangtarn Plipuech	Marie Bouzková Bethanie Mattek-Sands	2–6, 1–6

Singles: 2 (2 titles)

Result	W–L	Date	Tournament	Surface	Opponent	Score
Win	1–0	Nov 2018	WTA 125 Mumbai, India	Hard	Irina Khromacheva	1–6, 6–2, 6–3
Win	2–0	Nov 2018	WTA 125 Taipei, Taiwan	Carpet (i)	Sabine Lisicki	6–1, 6–3

Singles: 28 (18 titles, 10 runner–ups)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Oct 2010	ITF Pattaya, Thailand	10,000	Hard	Emma Flood	6–4, 6–3
Loss	1–1	Oct 2010	ITF Khon Kaen, Thailand	10,000	Hard	Zhu Lin	3–6, 2–6
Loss	1–2	Nov 2010	ITF Manila, Philippines	10,000	Hard	Piia Suomalainen	3–6, 3–6
Loss	1–3	Dec 2010	ITF Mandya, India	10,000	Hard	Anastasiya Vasylyeva	2–6, 6–3, 2–6
Win	2–3	May 2011	ITF Bangkok, Thailand	10,000	Hard	Ayu Fani Damayanti	6–2, 6–2
Win	3–3	May 2011	ITF Bangkok, Thailand	10,000	Hard	Peangtarn Plipuech	6–1, 6–0
Loss	3–4	Jun 2011	ITF Bangkok, Thailand	25,000	Hard	Marta Sirotkina	4–6, 3–6
Win	4–4	Jun 2011	ITF Pattaya, Thailand	10,000	Hard	Liang Chen	6–3, 6–4
Loss	4–5	Jul 2011	ITF Pattaya, Thailand	10,000	Hard	Liang Chen	6–2, 6–7(6), 5–7
Win	5–5	Nov 2011	ITF Kuching, Malaysia	10,000	Hard	Nungnadda Wannasuk	7–6(3), 6–3
Win	6–5	Nov 2011	ITF Manila, Philippines	10,000	Hard	Zhao Yijing	4–6, 6–4, 6–2
Win	7–5	Jul 2012	ITF Pattaya, Thailand	10,000	Hard	Nungnadda Wannasuk	6–2, 6–2
Win	8–5	Jul 2012	ITF Astana, Kazakhstan	25,000	Hard	Nudnida Luangnam	3–6, 6–3, 6–3
Win	9–5	Apr 2013	ITF Phuket, Thailand	25,000	Hard	Lisa Whybourn	6–0, 7–5
Win	10–5	Nov 2013	Toyota World Challenge, Japan	75,000	Carpet (i)	Hiroko Kuwata	3–6, 6–1, 6–3
Loss	10–6	Aug 2014	ITF Wuhan, China	50,000	Hard	Wang Qiang	2–6, 2–6
Win	11–6	May 2015	ITF Xuzhou, China	50,000	Hard	Chang Kai-chen	1–6, 7–5, 6–1
Loss	11–7	Nov 2015	Toyota World Challenge, Japan	75,000	Carpet (i)	Jana Fett	4–6, 6–4, 4–6
Loss	11–8	Jul 2016	ITF Wuhan, China	50,000	Hard	Wang Qiang	5–7, 2–6
Loss	11–9	May 2017	ITF Incheon, South Korea	25,000	Hard	Han Na-lae	6–7(2), 5–7
Win	12–9	Jul 2017	ITF Hua Hin, Thailand	25,000	Hard	Alisa Kleybanova	7–5, 6–7(4), 6–3
Win	13–9	Aug 2017	ITF Nonthaburi, Thailand	25,000	Hard	Yuan Yue	7–5, 6–2
Win	14–9	Apr 2018	Kōfu International Open, Japan	25,000	Hard	Bianca Andreescu	6–3, 6–3
Win	15–9	Apr 2018	ITF Kashiwa, Japan	25,000	Hard	Bianca Andreescu	6–3, 7–6(4)
Win	16–9	Oct 2021	ITF Monastir, Tunisia	15,000	Hard	Jennifer Luikham	6–2, 6–2
Loss	16–10	Apr 2022	ITF Chiang Rai, Thailand	25,000	Hard	Alex Eala	4–6, 2–6
Win	17–10	Apr 2022	ITF Chiang Rai, Thailand	25,000	Hard	Peangtarn Plipuech	6–3, 6–3
Win	18–10	Apr 2022	ITF Chiang Rai, Thailand	15,000	Hard	Talia Gibson	6–0, 6–1

Doubles: 27 (17 titles, 10 runner–ups)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Oct 2010	ITF Khon Kaen, Thailand	10,000	Hard	Varatchaya Wongteanchai	Huỳnh Phương Đài Trang Maya Kato	6–4, 7–5
Win	2–0	Nov 2010	ITF Manila, Philippines	10,000	Hard	Peangtarn Plipuech	Ivana King Jasmin Schnack	6–4, 7–5
Win	3–0	Dec 2010	ITF Bangalore, India	25,000	Hard	Nungnadda Wannasuk	Chen Yi Kumiko Iijima	7–6(7), 5–7, [10–8]
Loss	3–1	Jun 2011	ITF Pattaya, Thailand	10,000	Hard	Napatsakorn Sankaew	Liang Chen Zhao Yijing	6–1, 1–6, 5–7
Win	4–1	Nov 2011	ITF Kuching, Malaysia	10,000	Hard	Nungnadda Wannasuk	Lu Jiaxiang Lu Jiajing	6–4, 6–3
Win	5–1	Nov 2011	ITF Manila, Philippines	10,000	Hard	Peangtarn Plipuech	Zhao Yijing Zheng Junyi	6–3, 6–0
Loss	5–2	Nov 2011	ITF Manila, Philippines	10,000	Hard	Peangtarn Plipuech	Napatsakorn Sankaew Varunya Wongteanchai	1–6, 6–3, [6–10]
Win	6–2	Jul 2012	ITF Astana, Kazakhstan	25,000	Hard	Varatchaya Wongteanchai	Veronika Kapshay Ekaterina Yashina	6–2, 6–4
Win	7–2	Sep 2012	ITF Tsukuba, Japan	25,000	Hard	Varatchaya Wongteanchai	Yurina Koshino Mari Tanaka	6–2, 6–2
Win	8–2	May 2013	Kangaroo Cup, Japan	50,000	Hard	Erika Sema	Nao Hibino Riko Sawayanagi	6–4, 6–3
Loss	8–3	Nov 2013	ITF Taipei, Taiwan	50,000	Hard	Chen Yi	Lesley Kerkhove Arantxa Rus	4–6, 6–2, [12–14]
Loss	8–4	Jul 2014	ITF Bangkok, Thailand	10,000	Hard	Tamarine Tanasugarn	Varatchaya Wongteanchai Varunya Wongteanchai	3–6, 6–4, [8–10]
Loss	8–5	Nov 2015	Toyota World Challenge, Japan	75,000	Carpet (i)	Yuuki Tanaka	Akiko Omae Peangtarn Plipuech	6–3, 0–6, [9–11]
Win	9–5	Apr 2017	Kōfu International Open, Japan	25,000	Hard	Han Na-lae	Erina Hayashi Robu Kajitani	6–3, 6–0
Win	10–5	Jul 2017	ITF Hua Hin, Thailand	25,000	Hard	Ksenia Palkina	Naiktha Bains Karin Kennel	6–3, 2–6, [14–12]
Win	11–5	Mar 2018	Kōfu International Open, Japan	25,000	Hard	Gao Xinyu	Erina Hayashi Momoko Kobori	6–0, 2–6, [10–4]
Win	12–5	Jun 2018	Manchester Trophy, UK	100,000	Grass	Prarthana Thombare	Naomi Broady Asia Muhammad	7–6(5), 6–3
Loss	12–6	Oct 2018	Suzhou Ladies Open, China	100,000	Hard	Peangtarn Plipuech	Misaki Doi Nao Hibino	2–6, 3–6
Loss	12–7	Nov 2018	Shenzhen Longhua Open, China	100,000	Hard	Choi Ji-hee	Shuko Aoyama Yang Zhaoxuan	2–6, 3–6
Win	13–7	Oct 2021	ITF Monastir, Tunisia	15,000	Hard	Natsuho Arakawa	Mana Ayukawa Tamira Paszek	6–4, 6–2
Loss	13–8	Apr 2022	ITF Chiang Rai, Thailand	25,000	Hard	Momoko Kobori	Gozal Ainitdinova Maria Timofeeva	6–2, 5–7, [4–10]
Win	14–8	Jun 2022	ITF Chiang Rai, Thailand	25,000	Hard	Momoko Kobori	Misaki Matsuda Naho Sato	6–3, 6–3
Win	15–8	Sep 2022	ITF Darwin, Australia	25,000	Hard	Momoko Kobori	Yui Chikaraishi Nanari Katsumi	6–2, 7–6(3)
Loss	15–9	Dec 2022	Indoor Championships, Japan	60,000	Hard (i)	Momoko Kobori	Liang En-shuo Wu Fang-hsien	6–2, 6–7(5), [2–10]
Loss	15–10	Mar 2023	ITF Jakarta, Indonesia	25,000	Hard	Peangtarn Plipuech	Ma Yexin Moyuka Uchijima	0–6, 2–6
Win	16–10	May 2023	ITF Goyang, South Korea	25,000	Hard	Punnin Kovapitukted	Guo Hanyu Tang Qianhui	6–3, 6–1, [10–6]
Win	17–10	Jun 2023	ITF Tokyo, Japan	25,000	Hard	Kanako Morisaki	Talia Gibson Natsumi Kawaguchi	1–6, 6–2, [10–3]