Surasak Wankrahem (; born January 1, 1983), known professionally as Ronnachai Naratreekul (), is a Thai former professional Muay Thai fighter. He is a former Lumpinee Stadium Light Flyweight Champion.
Ronnachai started to compete in Bangkok in 1995 for the Onesongchai promotion. He won the Lumpinee Stadium Light Flyweight title against on Chalamkhao Kiatpanthong June 12, 1998.
Thorughout his career Ronnachai defeated many notable champions such as Thongchai Tor.Silachai, Fahsuchon Sit-O, Anuwat Kaewsamrit, Bovy Sor Udomson and Jomthong Chuwattana.
After retiring, Ronnachai became a trainer. He currently works at the Dark Horse Boxing Gym. He was selected as the opponent for the retirement fight of Wanchalong PK.Saenchai which will happen on April 7, 2026.
|- style="background:#fbb;" | 2007-05-08 || Loss ||align=left| Chalermdet Sor.Tawanrung || Khunsuk Trakunyang, Rajadamnern Stadium || Bangkok, Thailand ||Decision || 5 || 3:00
|- style="background:#fbb;" | 2007-03-29 || Loss ||align=left| Jomthong Chuwattana || Jarumueng, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2007-02-02 || Loss ||align=left| Anuwat Kaewsamrit || Khunsuk Trakunyang, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- bgcolor="#cfc" | 2006-12-28 || Win ||align=left| Singtongnoi Por.Telakun || Phettongkham, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2006-10-31 || Win ||align=left| Phetto Sitjaopho || Khunsuk Trakunyang, Lumpinee Stadium || Bangkok, Thailand || KO (Punch)|| 4 ||
|- style="background:#fbb;" | 2006-09-04 || Loss ||align=left| Jomthong Chuwattana || Daorungchujaroen, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2006-07-28 || Win ||align=left| Anuwat Kaewsamrit || Khunsuk Trakunyang, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- bgcolor="#cfc" | 2006-05-04 || Win ||align=left| Phetek Kiatyongyut || Kiatyongyut, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2006-03-23 || Win||align=left| Pettawee Sor Kittichai || Kiatyongyut, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2006-02-21 || Loss ||align=left| Longoen Pitakkrushidan || Phetsupaphan, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2005-12- || Loss ||align=left| Phetek Kiatyongyut || Omnoi Stadium || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2005-11-02 || Win ||align=left| Jomthong Chuwattana || Daorungchujaroen, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2005-09-22 || Loss ||align=left| Anuwat Kaewsamrit || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || TKO (High kick) || 3 ||
|- style="background:#cfc;" | 2005-08-12 || Win ||align=left| Bovy Sor Udomson || Queens Birthday || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2005-07-20 || Win ||align=left| Saenchernglek Jirakirengkrai || Daorungchujaroen, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2005- || Win ||align=left| Saenchernglek Jirakirengkrai || Daorungchujaroen, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#c5d2ea;" | 2005-05-20 || NC ||align=left| Kongprai Chor.Phaili || Lumpinee Stadium || Bangkok, Thailand || Ref.stop (Kongprai dismissded) || 3 ||
|- style="background:#cfc;" | 2005-02-17 || Win ||align=left| Phetek Kiatyongyut || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2005-01-20 || Win ||align=left| Dennaklang Sor.Weerapan || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2004-12-25 || Loss ||align=left| Saenchainoi Nongkeesuwit || Omnoi Stadium || Samut Sakhon, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2004-11-13 || Win ||align=left| Saenchainoi Nongkeesuwit || Onesongchai || Surin province, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2004-09-02 || Loss ||align=left| Wuttidet Lukprabat || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2004-07-08 || Loss||align=left| Phet-Ek Sitjaopho || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2004-06-03 || Loss||align=left| Sueahwallek Chor.Sopipong || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2004-03-27|| Win ||align=left| Rittichai Somkidkarnka || Omnoi Stadium, Isuzu Cup, 3rd place fight|| Samut Sakhon, Thailand ||Decision || 5 || 3:00
|- style="background:#cfc;" | 2004-01- || Win ||align=left| Anuwat Kaewsamrit || Omnoi Stadium, Isuzu Cup, Semifinal || Samut Sakhon, Thailand || KO (Right cross) || 2 ||
|- style="background:#cfc;" | 2003-12-27|| Win ||align=left| Rittichai Somkidkarnka || Omnoi Stadium, Isuzu Cup|| Samut Sakhon, Thailand ||Decision || 5 || 3:00
|- bgcolor="#cfc" | 2003-10-04 || Win||align=left| Fahsuchon Sit-O || Omnoi Stadium, Isuzu Cup|| Samut Sakhon, Thailand || TKO (Referee stopapge) || 2 ||
|- style="background:#fbb;" | 2003-08-28 || Loss ||align=left| Saenchai Sor.Khamsing || OneSongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2003-07-27 || Win||align=left| Sayannoi Kiattipraphat || OneSongchai + Por. Telakun, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#;" | 2003-06-23 || ||align=left| Bovy Sor Udomson || Onesongchai + Petchthongkam, Rajadamnern Stadium || Bangkok, Thailand || || ||
|- style="background:#c5d2ea;" | 2003-04-26 || Draw||align=left| Bovy Sor Udomson || OneSongchai || Chachoengsao Province, Thailand || Decision || 5 || 3:00
|- bgcolor="#fbb" | 2003-03-28 || Loss ||align=left| Fahsuchon Sit-O || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#fbb;" | 2002-10-09 || Loss ||align=left| Wuttidet Lukprabat || Onesongchai + Palangnum, Rajadamnern Stadium || Bangkok, Thailand || Decision ||5 ||3:00
|- style="background:#cfc;" | 2002-08-07 || Win ||align=left| Thongchai Tor.Silachai || Onesongchai, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2002-07-09 || Win ||align=left| Thongchai Tor.Silachai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2002-03-04 || Loss ||align=left| Klairung Sor.Chaicharoen || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2002-01-14 || Loss ||align=left| Klairung Sor.Chaicharoen || Wan Muay Thai + Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1999-02-12 || Win ||align=left| Michael Sor.Sakulpan || Fairtex, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1998-08-21 || Loss||align=left| Chansak Singkhlongsi || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1998-06-12 || Win ||align=left| Chalamkhao Kiatpanthong || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1998-05-05 || Win ||align=left| Lertchai Kaitbodin || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1998-03-27 || Win ||align=left| Therdthailak Nakornthongparkview || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1998-01-16 || Win||align=left| Saenkeng Sor.Weerakul || || Thailand || Decision || 5 || 3:00
|- style="background:#c5d2ea;" | 1998-01-03 || Draw||align=left| Chansak Singkhlongsi || Songchai Nai Khanom Tom, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1997-11-18 || Win||align=left| Kaewfannoi Sor.Ratchadaphon || || Thailand || KO (Punches)|| 5 ||
|- style="background:#fbb;" | 1997-09-23 || Loss||align=left| Sakol Meenayothin || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1997-06-28 || Win ||align=left| Yodradap Daopaedriew || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1997- || Win ||align=left| Dechaklon Sor.Sumalee || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1996-07-26 || Win ||align=left| Rungrit Sitjamlong || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1996-06-25 || Win ||align=left| Yodsanchai Sitthiyodthong|| Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1996-05-29 || Win ||align=left| Yodradap Daopaedriew || Daorung Sor.Ploenchit, Adisorn Stadium || Saraburi, Thailand || Decision || 5 || 3:00
|- | colspan=9 | Legend: