Petchthongchai Sor.Sommai () is a Thai Muay Thai fighter.
In 2020 Petchthongchai was announced as one of the eight contestants in the 31st Isuzu Cup happening at 138 lbs and taking place at the Omnoi Stadium. Petchthongchai faced Hercules Wor.Jakrawut on February 13, 2021, as part of the group stage of the Isuzu Cup. He lost the fight by decision.
On April 10, 2021, Petchthongchai faced Petchamnee Por.Lakboon as the semi final of the Isuzu Cup. He won the fight by decision and qualified for the 31st Isuzu Cup Final.
On February 19, 2022, Petchthongchai rematched Hercules Wor.Jakrawut in the final of the 31st Isuzu Cup at the Omnoi Stadium. The fight had been postponed for nine months due to the COVID-19 pandemic. Petchthongchai won the fight by decision and took home the prize consisting of a million baht, a pickup truck and a contract with the Thai Fight promotion.
Petchthongchai made his Thai Fight debut on May 8, 2022, at THAI FIGHT Sung Noen where he faced Suksawat Saengmorakot. He won the fight by decision.
October 16, 2022, Petchthongchai faced Ali Ghodratisaraskan at THAI FIGHT. He won the fight by second round knockout to advance to the semi finals stage of the 2022 Thai Fight King's Cup.
November 20, 2022, Petchthongchai defeated Elit Samphors by decision at THAI FIGHT Vana Nava Hua Hin and qualified for the 2022 Thai Fight King's Cup Final.
On December 24, 2022, Petchthongchai faced Theeradet Chor.Hapayak in the Thai Fight 67kg King's Cup Final. He won the fight by decision.
In 2023 Petchthongchai entered the Rajadamnern World Series tournament in the Super Lightweight division. On July 15, 2023, Petchthongchai defeated Sakulchailek Pangkongpap by unanimous decision for his last group stage match and qualified for the Final 4 of the competition. On August 19, 2023 Petchthongchai faced Nuenglanlek Jitmuangnon in the RWS Final 4. He lost the fight by unanimous decision.
On October 30, 2023, Petchthongchai faced Siwakorn Kiatcharoenchai at a Muay Thai Pantamit + Sor.Salacheep promotes event in the Lopburi province. He won the fight by decision.
On March 2, 2024, Petchthongchai faced Dam Parunchai with his Rajadamnern Stadium Super Lightweight (140 lbs) title at play on a Rajadamnern World Series event. He lost the fight by unanimous decision.
In 2024 Petchthongchai reentered the Rajadamnern World Series in the 140 lbs division. For his first group match he faced Turach Novruzov on June 29, 2024. Petchthongchai won the fight by unanimous decision.
On December 7, 2024, Petchthongchai faced Dam Parunchai for the third time in the final of the 2024 Rajadamnern World Series 140 lbs tournament. Petchthongchai won the fight by unanimous decision.
|- style="background:#cfc;" | 2025-12-29 || Win ||align=left| Julio Lobo || Phetchbuncha Stadium 21st Anniversary show || Ko Samui, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2025-10-04 || Win ||align=left| Francesco Porcu || Rajadamnern World Series || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2025-07-26 || Win ||align=left| Khunhanlek SinghaMawynn|| Rajadamnern World Series || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00 |- style="background:#cfc;" | 2025-04-19 || Win ||align=left| Jozef Molnar || Rajadamnern World Series, Rajadamnern Stadium || Bangkok, Thailand ||Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-12-07 || Win ||align=left| Dam Parunchai || Rajadamnern World Series - Final Rajadamnern Stadium || Bangkok, Thailand ||Decision (Unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2024-10-26 ||Win ||align=left| Alfie Pearse || Rajadamnern World Series - Final 4, Rajadamnern Stadium || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-09-14 || Win ||align=left| Khunhanlek SinghaMawynn || Rajadamnern World Series - Group Stage, Rajadamnern Stadium || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-06-29 || Win ||align=left| Turach Novurov || Rajadamnern World Series - Group Stage, Rajadamnern Stadium || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-05-25 || Win ||align=left| Damien Alamos || Rebellion Muaythai || Melbourne, Australia || Decision (Unanimous) || 5 || 3:00
|- style="background:#fbb;" | 2024-04-27 || Loss ||align=left| Dam Parunchai|| Ruangchaijao Surat || Surat Thani, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2024-03-02 || Loss ||align=left| Dam Parunchai|| Rajadamnern World Series, Rajadamnern Stadium || Bangkok, Thailand || Decision (Unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2023-12-16 || Win ||align=left| Chujaroen Dabransarakarm || Rajadamnern World Series || Bangkok, Thailand || Decision || 5||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2023-10-30 || Win ||align=left| Siwakorn Kiatcharoenchai || Muay Thai Pantamit + Sor.Salacheep || Lopburi province, Thailand || Decision || 5||3:00
|- style="background:#fbb;" | 2023-08-19|| Loss||align=left| Nuenglanlek Jitmuangnon || Rajadamnern World Series - Final 4|| Bangkok, Thailand || Decision (Unanimous)|| 3||3:00
|- style="background:#cfc;" | 2023-07-15|| Win ||align=left| Sakulchailek Pangkongpap || Rajadamnern World Series - Group Stage|| Bangkok, Thailand || Decision (Unanimous) || 3 ||3:00
|- style="background:#cfc;" | 2023-06-10|| Win ||align=left| Capitan Petchyindee Academy || Rajadamnern World Series - Group Stage|| Bangkok, Thailand || Decision (Unanimous) || 3 ||3:00
|- style="background:#fbb;" | 2023-04-22|| Loss ||align=left| Erdem Dincer || Rajadamnern World Series - Group Stage|| Bangkok, Thailand || KO (Right cross) || 2 ||1:33
|- style="background:#cfc;" | 2023-03-25|| Win ||align=left| Tongsiam Kiatsongrit || Rajadamnern World Series - Group Stage|| Bangkok, Thailand || Decision (Unanimous) || 3 ||3:00
|- style="background:#cfc;" | 2022-12-24|| Win || align="left" | Teeradet Chor.Hapayak || Thai Fight: Metropolitan Police Bureau 100th Anniversary || Bangkok, Thailand || Decision || 3 ||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2022-11-20|| Win || align="left" | Elit Samphors || THAI FIGHT Vana Nava Hua Hin || Hua Hin district, Thailand || Decision || 3 ||3:00
|- style="background:#cfc;" | 2022-10-16|| Win || align="left" | Ali Ghodratisaraskan || THAI FIGHT Vajiravudh || Bangkok, Thailand || KO (Elbow) || 2 ||
|- style="background:#cfc;" | 2022-09-23|| Win ||align=left| Petchmanee Por.Lakboon || Lumpini Muay Thai Pitaktham Fight, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2022-08-02|| Win ||align=left| Alex Jitmuangnon || Lumpini Muay Thai Pitaktham Fight, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2022-07-06|| Loss ||align=left| Alex Jitmuangnon || Muay Thai Palangmai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2022-05-08|| Win || align="left" | Suksawat Saengmorakot|| THAI FIGHT Sung Noen || Sung Noen district, Thailand || Decision || 3 || 3:00
|- style="background:#cfc;" | 2022-02-19|| Win||align=left| Hercules Wor.Jakrawut || SuekJaoMuayThai, Siam Omnoi Stadium - Isuzu Cup Final|| Samut Sakhon, Thailand || Decision ||5 ||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2021-04-10|| Win ||align=left| Petchmanee Por.Lakboon || SuekJaoMuayThai, Siam Omnoi Stadium - Isuzu Cup Semi Final || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2021-02-13|| Loss||align=left| Hercules Wor.Jakrawut || SuekJaoMuayThai, Siam Omnoi Stadium - Isuzu Cup || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2020-11-21|| Win ||align=left| Yod-IQ PK.Saenchai || SuekJaoMuayThai, Siam Omnoi Stadium - Isuzu Cup || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2020-10-17|| Win ||align=left| Traitep Por.Telakun || Siam Omnoi Stadium - Isuzu Cup|| Samut Sakhon, Thailand || TKO (Knees) || 4 ||
|- style="background:#fbb;" | 2020-09-10|| Loss ||align=left| Yod-IQ PK.Saenchai || Sor.Sommai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2020-07-18|| Win ||align=left| Wanpanlan Pumpanmuang || JaoMuayThai, Siam Omnoi Stadium || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2020-03-12|| Win ||align=left| Karuhat Sitchefboontham || Sor.Sommai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2020-01-01|| Win ||align=left| Supmanee EnnieMuayThai || Singmawin, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2019-11-23|| Win ||align=left| Jack ApichartMuaythai || JaoMuayThai, Siam Omnoi Stadium || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2019-09-16|| Win ||align=left| Jack ApichartMuaythai || Sor.Sommai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2019-08-05|| Win ||align=left| Samingdong Sor.Chatri || Sor.Sommai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2019-06-20|| Loss ||align=left| Samingdong Sor.Chatri || Sor.Sommai, Rajadamnern Stadium || Bangkok, Thailand || TKO || 2 ||
|- | colspan=9 | Legend:
|- style="background:#cfc;" | 2025-12-17 || Win ||align=left| Bang Quang Thang || SEA Games 2025, Final || Samut Prakan, Thailand || Decision || 3 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2025-12-16 || Win ||align=left| Tun Min Aung || SEA Games 2025, Semifinals || Samut Prakan, Thailand || Decision || 3 || 3:00
|- | colspan=9 | Legend: