| ITF W25華欣 | 10/14 02:55 | 27 | Mananchaya Sawangkaew v 白卓軒 | 2-6,4-6 | |
| ITF W25華欣 | 10/13 04:50 | 26 | Mananchaya Sawangkaew v 納塔利 Siedliska | 6-3,6-2 | |
| ITF W25華欣 | 10/11 09:55 | 25 | Lesley P Kerkhove v Mananchaya Sawangkaew | 4-6,4-6 | |
| ITF W25華欣 | 10/08 03:55 | 28 | Mananchaya Sawangkaew v 白卓軒 | 1-6,1-6 | |
| ITF W25華欣 | 10/07 07:30 | 27 | Mananchaya Sawangkaew v 葉卡捷琳娜•雷恩戈爾德 | 6-4,6-1 | |
| ITF W25華欣 | 10/06 05:30 | 26 | Mananchaya Sawangkaew v 艾米莉•維爾克 | 7-6,6-7,7-6 | |
| ITF W25華欣 | 10/04 03:25 | 25 | 普利普耶荷 v Mananchaya Sawangkaew | 6-3,3-6,4-6 | |
| ITF W15清萊 | 06/19 02:00 | 29 | Mananchaya Sawangkaew v 佐藤南帆 | 4-6,2-6 | |
| ITF W15清萊 | 06/18 04:40 | 28 | 彭寧•科瓦皮圖克特 v Mananchaya Sawangkaew | 2-6,3-6 | |
| ITF W15清萊 | 06/17 02:00 | 27 | Mananchaya Sawangkaew v 帕查琳 Cheapchandej | 7-6,5-7,6-3 | |
| ITF W15清萊 | 06/16 07:10 | 26 | Mananchaya Sawangkaew v Kamonwan 布亞姆 | 6-1,6-2 | |
| ITF W15清萊 | 06/15 01:50 | 25 | 戈薩爾 Ainitdinova v Mananchaya Sawangkaew | 3-6,2-6 | |
| ITF W15諾曼 | 10/13 17:30 | 25 | Mia Kupres v Mananchaya Sawangkaew | 6-4,7-6 | |
| ITF W15拉伯克 | 10/02 17:00 | 28 | Adriana Reami v Mananchaya Sawangkaew | 6-1,3-6,7-6 | |
| ITF W15拉伯克 | 10/01 16:30 | 27 | Mananchaya Sawangkaew v Layne Sleeth | Retired | |
| ITF W15拉伯克 | 09/30 15:00 | 26 | Mananchaya Sawangkaew v Ayumi Miyamoto | 6-0,6-1 | |
| ITF W15拉伯克 | 09/29 17:00 | 25 | Mananchaya Sawangkaew v 卡門•柯利 | 6-3,6-3 | |
| ITF W25沃斯堡 | 09/20 14:00 | 54 | Mananchaya Sawangkaew v 麥卡特尼•凱斯勒 | 6-7,2-6 | |
| ITF W25焦特布爾 | 02/20 06:05 | 26 | 比爾夫•堅吉茲 v Mananchaya Sawangkaew | 6-0,7-5 | |
| ITF W25焦特布爾 | 02/19 08:35 | 25 | 葉卡捷琳娜•尼基弗洛娃 v Mananchaya Sawangkaew | 4-6,4-6 | |
| WTA華欣 | 02/08 09:40 | 45 | Chihiro Muramatsu v Mananchaya Sawangkaew | 3-6,6-0,6-3 | |
| ITF W25暖武里府 | 02/05 05:40 | 25 | 比比安娜•朔夫斯 v Mananchaya Sawangkaew | Retired | |
| ITF W25暖武里府 | 02/04 02:30 | 44 | Mananchaya Sawangkaew v 張瑩 | 4-6,6-3,10-6 | |
| ITF W25暖武里府 | 02/03 04:35 | 44 | Mananchaya Sawangkaew v Jiho Shin | 6-3,6-0 | |
| ITF W25暖武里府 | 02/02 08:25 | 44 | Mananchaya Sawangkaew v 瑪麗亞·菲利莫尼基納 | 6-0,6-0 | |
| ITF W25暖武里府 | 01/29 04:20 | 25 | Mananchaya Sawangkaew v 莉奧妮•孔 | 6-4,2-6,3-6 | |
| ITF W25暖武里府 | 01/28 02:30 | 44 | 卡塔琳娜•卡瓦 v Mananchaya Sawangkaew | 2-6,2-6 | |
| ITF W25暖武里府 | 01/27 02:30 | 44 | 張瑩 v Mananchaya Sawangkaew | 3-6,2-6 | |
| ITF W25暖武里府 | 01/26 03:50 | 44 | 納塔帕特 Piwbangruk v Mananchaya Sawangkaew | 2-6,1-6 | |
| ITF W25浦那 | 12/09 05:30 | 54 | Mananchaya Sawangkaew v 彭寧•科瓦皮圖克特 | 1-6,7-6,10-12 |
Mananchaya Sawangkaew (Thai: มนัญชญา สว่างแก้ว; born 10 July 2002) is a tennis player from Thailand. She has a career-high WTA singles ranking of world No. 192, achieved on 20 May 2024 and a doubles ranking of No. 546, achieved on 31 July 2023.
She has a career-high singles ranking of 247 by the Women's Tennis Association (WTA), achieved on 4 December 2023. Sawangkaew has won two singles titles and one doubles title on the ITF Women's Circuit.
On the ITF Junior Circuit, she achieved a career-high combined ranking of 14, on 28 January 2019. She reached the quarterfinals of the girls' singles draw at the 2019 Australian Open.
Sawangkaew made her debut for Thailand Fed Cup team in 2019.