Mizuki Hiruta retained her WBO junior bantamweight world title with a unanimous decision victory over Caral Merino on Saturday at Commerce Casino in Commerce, California. The fight was the co-main event to Serhii Bohachuk's decision win against Mykal Fox.
Hiruta (8-0, 2 KOs), of Tokyo, dominated Merino and won by scorecards of 98-92, 98-92 and 99-91. Hiruta used her jab and hand speed to keep Merino at a distance and was able to land combinations when pushing Merino against the ropes.
Merino (17-3, 4 KOs), of Buenos Aires, Argentina, was riding a 13-fight winning streak before losing to Hiruta.
With the victory, Hiruta solidifies her spot atop the junior bantamweight division.
Rankings are updated every Tuesday. They're based on recent bouts, head-to-head competition and the quality of opponent. As with almost everything, until fighters square off against one another, there is a layer of subjectivity to it. Fighters who haven't fought in 18 months and don't have a fight scheduled will be removed from the rankings until they fight again.
For a list of the current champions in all weight classes, click here. For women's P4P rankings, click here.
Heavyweight - Light heavyweight - Super middleweight - Middleweight - Junior middleweight - Welterweight - Junior welterweight - Lightweight - Junior lightweight - Featherweight - Junior featherweight - Bantamweight - Junior bantamweight - Flyweight - Junior flyweight - Strawweight - Atomweight
HEAVYWEIGHT (Over 175+ pounds)
1. Claressa Shields 
Previous ranking: 1
Record: 16-0, 3 KO
Last: W (UD10) Danielle Perkins, Feb. 2
Next: July 26 vs. Lani Daniels
2. Danielle Perkins Previous ranking: 2
Record: 5-1, 2 KOs
Last: L (UD10) Claressa Shields, Feb. 2
Next: TBA
3. Vanessa Lepage-Joanisse Previous ranking: 3
Record: 7-2, 2 KO
Last: L (KO2) Claressa Shields, July 27
Next: TBA
4. Minellis Blanco Previous ranking: 4
Record: 6-0, 6 KOs
Last: W (TKO1) Paola Esther Herrera, Aug. 24
Next: TBA
5. Giovanna Gonzalez Previous ranking: 5
Record: 6-3-1, 4 KOs
Last: W (TKO4) Sandra Lopez Gomez, Dec. 8
Next: TBA
Note: Raquel Miller has been removed for inactivity.
LIGHT HEAVYWEIGHT (Up to 175 pounds)
1. Lani Daniels Previous ranking: 1
Record: 11-2-2, 1 KOs
Last: W (UD10) Bolatito Oluwole, Sept. 7
Next: July 26 vs. Claressa Shields
2. Che Kenneally Previous ranking: 2
Record: 5-0, 2 KOs
Last: W (TKO3) Angie Paola Rocha, July 20
Next: TBA
3. Angie Paola Rocha Previous ranking: 3
Record: 16-5-3, 9 KOs
Last: W (TKO4) Lorena Carrillo, Sept. 17
Next: TBA
4. Celina Agwu Previous ranking: 4
Record: 5-1, 5 KOs
Last: W (TKO8) Bolatito Oluwole, Dec. 26
Next: TBA
5. Sarah Scheurich Previous ranking: 5
Record: 5-0, 3 KOs
Last: W (UD6) Nora Komjathi, Oct. 26
Next: TBA
SUPER MIDDLEWEIGHT (Up to 168 pounds)
1. Shadasia Green Previous ranking: 1
Record: 15-1, 11 KOs
Last: W (SD10) Melinda Watpool, Nov. 15
Next: July 11 vs. Savannah Marshall
2. Franchon Crews-Dezurn Previous ranking: 2
Record: 9-2, 2 KOs
Last: W (UD10) Shadasia Green, Dec. 15, 2023
Next: June 6 vs. Citlalli Ortiz
3. Hanna Gabriels Previous ranking: 3
Record: 22-2-1, 13 KOs
Last: W (TKO4) Sara Anti Gabriel, Dec. 29
Next: TBA
4. Nisa Rodriguez Previous ranking: 4
Record: 3-1, 1 KO
Last: W (MD8) Deborah Melhorn, April 26
Next: TBA
5. Melinda Watpool Previous ranking: 5
Record: 7-1, 2 KOs
Last: L (SD10) Shadasia Green, Nov. 15
Next: TBA
Note: Savannah Marshall has been removed for inactivity.
MIDDLEWEIGHT (Up to 160 pounds)
1. Desley Robinson Previous ranking: 1
Record: 10-3, 3 KOs
Last: W (UD10) Chloe Chaos, April 11
Next: TBA
2. Mary Casamassa Previous ranking: 2
Record: 6-0, 1 KO
Last: W (UD8) Adriana Dos Santos Araujo, Nov. 15
Next: July 11 vs. Tamm Thibeault
3. Olivia Curry Previous ranking: 3
Record: 7-2-1, 2 KOs
Last: Draw (SD16) Melody Popravak, April 27, 2024
Next: TBA
4. Chloe Chaos Previous ranking: 4
Record: 6-2-1, 3 KOs
Last: W (UD10) Desley Robinson, April 11
Next: TBA
5. Mapule Ngubane Previous ranking: 5
Record: 14-9-3, 3 KOs
Last: W (UD8) Nomadithini Ndyambo, Dec. 20
Next: TBA
JUNIOR MIDDLEWEIGHT (Up to 154 pounds)
1. Cecilia Braekhus Previous ranking: 1
Record: 38-2-1, 9 KOs
Last: W (UD10) Maricela Cornejo, Aug. 10
Next: TBA
2. Oshae Jones Previous ranking: 2
Record: 8-0, 3 KOs
Last: W (SD10) Femke Hermans, Nov. 22
Next: TBA
3. Femke Hermans Previous ranking: 3
Record: 18-5, 7 KOs
Last: L (SD10) Oshae Jones, Nov. 22
Next: TBA
4. Mary Spencer Previous ranking: 4
Record: 10-2, 6 KOs
Last: W (UD10) Ogleidis Suarez, April 10
Next: TBA
5. Maricela Cornejo Previous ranking: 5
Record: 19-7, 7 KOs
Last: L (UD10) Cecilia Braekhus, Aug. 10
Next: TBA
Note: Ema Kozin has been removed for inactivity.
WELTERWEIGHT (Up to 147 pounds)
1. Mikaela Mayer Previous ranking: 1
Record: 21-2, 5 KOs
Last: W (UD10) Sandy Ryan, March 29
Next: TBA
2. Lauren Price Previous ranking: 2
Record: 9-0, 2 KO
Last: W (UD10) Natasha Jonas, March 7
Next: TBA
3. Sandy Ryan Previous ranking: 3
Record: 7-3-1, 3 KOs
Last: L (UD10) Mikaela Mayer, March 29
Next: TBA
4. Natasha Jonas Previous ranking: 4
Record: 16-3-1, 9 KOs
Last: L (UD10) Lauren Price, March 7
Next: TBA
5. Layla McCarter Previous ranking: 5
Record: 47-13-5, 13 KOs
Last: W (TKO4) Paulina Cardona, Feb. 1
Next: TBA
JUNIOR WELTERWEIGHT (Up to 140 pounds)
Katie Taylor defeats Amanda Serrano to remain undisputed champion at AT&T Stadium.
1. Katie Taylor Previous ranking: 1
Record: 24-1, 6 KOs
Last: W (UD10) Amanda Serrano, Nov. 15
Next: July 11 vs. Amanda Serrano
2. Amanda Serrano Previous ranking: 2
Record: 47-3-1, 31 KOs
Last: L (UD10) Katie Taylor, Nov. 15
Next: July 11 vs. Katie Taylor
3. Chantelle Cameron Previous ranking: 3
Record: 20-1, 8 KOs
Last: W (UD10) Patricia Berghult, Nov. 2
Next: July 11 vs. Jessica Camara
4. Elhem Mekhaled Previous ranking: 4
Record: 17-3, 3 KOs
Last: L (MD10) Chantelle Cameron, July 20
Next: June 27 vs. Leila Beaudoin
5. Anahi Ester Sanchez Previous ranking: 5
Record: 26-6, 13 KOs
Last: W (SD10) Aldana Pons, May 3
Next: TBA
LIGHTWEIGHT (Up to 135 pounds)
1. Caroline Dubois Previous ranking: 1
Record: 11-0-1, 5 KO
Last: W (MD10) Bo Mi Re Shin, March 7
Next: TBA
2. Terri Harper Previous ranking: 2
Record: 15-2-2, 6 KOs
Last: W (UD10) Rhiannon Dixon, Sept. 28
Next: May 23 vs. Natalie Zimmermann
3. Beatriz Fereira Previous ranking: 3
Record: 6-0, 2 KO
Last: W (UD10) Licia Boudersa, Dec. 14
Next: June 7 vs. Maria Ines Ferreyra
4. Stephanie Han Previous ranking: 4
Record: 10-0, 3 KOs
Last: W (KO1) Hannah Terlep, Feb. 22
Next: July 12 vs. Bexcy Mateus
5. Rhiannon Dixon Previous ranking: 5
Record: 10-1, 1 KO
Last: L (UD10) Terri Harper, Sept. 28
Next: TBA
JUNIOR LIGHTWEIGHT (Up to 130 pounds)
1. Alycia Baumgardner Previous ranking: 1
Record: 15-1, 1 NC, 19 KOs
Last: No contest (NC4) Delfine Persoon, Sept. 27
Next: July 11 vs. Jennifer Miranda
2. Delfine Persoon Previous ranking: 2
Record: 49-3, 19 KOs
Last: No contest (NC4) Alycia Baumgardner, Sept. 27
Next: TBA
3. Leila Beaudoin Previous ranking: 3
Record: 12-1, 1 KO
Last: W (UD10) Lizbeth Crespo, Aug. 17
Next: June 27 vs. Elhem Mekhaled
4. Maira Moneo Previous ranking: 4
Record: 16-2, 3 KOs
Last: W (UD10) Florencia Nicole Zalazar, April 5
Next: TBA
5. Jennifer Miranda Previous ranking: 5
Record: 12-0, 1 KOs
Last: W (UD10) Teresa Almengor, Oct. 20
Next: July 11 vs. Alycia Baumgardner
FEATHERWEIGHT (Up to 126 pounds)
1. Amanda Serrano Previous ranking: 1
Record: 47-3-1, 31 KOs
Last: L (UD10) Katie Taylor, Nov. 15
Next: July 11 vs. Katie Taylor
2. Tiara Brown Previous ranking: 2
Record: 19-0, 11 KOs
Last: W (SD10) Skye Nicolson, March 22
Next: TBA
3. Nina Meinke Previous ranking: 3
Record: 19-3, 4 KOs
Last: W (MD10) Daniela Romina Bermudez, Sept. 21
Next: TBA
4. Skye Nicolson Previous ranking: 4
Record: 12-1, 1 KOs
Last: L (SD10) Tiara Brown, March 22
Next: TBA
5. Sarah Mahfoud Previous ranking: 5
Record: 15-2, 3 KOs
Last: W (MD10) Danila Ramos, Nov. 29
Next: TBA
JUNIOR FEATHERWEIGHT (Up to 122 pounds)
1. Ellie Scotney Previous ranking: 1
Record: 10-0, 0 KOs
Last: W (UD10) Mea Motu, Jan. 25
Next: July 11 vs. Yamileth Mercado
2. Yamileth Mercado Previous ranking: 2
Record: 24-3, 5 KOs
Last: W (UD10) Ramla Ali, June 29
Next: July 11 vs. Ellie Scotney
3. Mayelli Flores Rosquero Previous ranking: 3
Record: 13-1-1, 4 KOs
Last: W (SD10) Nazarena Romero, May 10
Next: TBA
4. Erika Cruz Previous ranking: 4
Record: 17-2-1, 3 KOs
Last: Draw (SD10) Nazarena Romero, May 11
Next: TBA
5. Phannarai Netisri Previous ranking: 5
Record: 15-0, 6 KO
Last: W (UD10) Maria Magdalena Rivera, April 13
Next: TBA
BANTAMWEIGHT (Up to 118 pounds)
1. Dina Thorslund Previous ranking: 1
Record: 23-0, 9 KOs
Last: W (UD10) Terumi Nuki, Oct. 25
Next: July 11 vs. Shurretta Metcalf
2. Cherneka Johnson Previous ranking: 2
Record: 17-2, 7 KOs
Last: W (TKO7 Nina Hughes, March 22
Next: TBA
3. Shurretta Metcalf Previous ranking: 3
Record: 14-4-1, 2 KOs
Last: W (UD10) Miyo Yoshida, Oct. 23
Next: July 11 vs. Dina Thorslund
4. Florencia Ayelen Juarez Previous ranking: 4
Record: 13-1, 1 KO
Last: W (UD10) Marianela Soledad Ramirez, Oct. 5
Next: TBA
5. Diana Laura Fernandez Previous ranking: 5
Record: 34-4-1, 5 KOs
Last: W (UD10) Terumi Nuki, Feb. 28
Next: TBA
JUNIOR BANTAMWEIGHT (Up to 115 pounds)
1. Mizuki Hiruta Previous ranking: 1
Record: 8-0, 2 KOs
Last: W (UD10) Carla Merino, May 17
Next: TBA
2. Asley Gonzalez Macias Previous ranking: 2
Record: 17-2, 7 KOs
Last: W (UD10) Mary Romero, Dec. 12
Next: TBA
3. Diana Laura Fernandez Previous ranking: 3
Record: 34-4-1, 5 KOs
Last: W (UD10) Terumi Nuki, Feb. 28
Next: TBA
4. Irma Garcia Previous ranking: 4
Record: 24-5-1, 4 KOs
Last: W (UD10) Gloria Gallardo, Dec. 14
Next: TBA
5. Micaela Milagros Lujan Previous ranking: 5
Record: 15-2-1, 6 KO
Last: W (TKO6) Debora Vanesa Gomez, Nov. 29
Next: June 14 vs. Ayelen Micaela Alejandra Granadino
FLYWEIGHT (Up to 112 pounds)
1. Gabriela Fundora Previous ranking: 1
Record: 16-0, 8 KOs
Last: W (TKO7) Marilyn Badillo, April 19
Next: TBA
2. Kenia Enriquez Previous ranking: 2
Record: 28-1, 11 KOs
Last: W (UD10) Maria Salinas, Feb. 2
Next: TBA
3. Marilyn Badillo Amaya Previous ranking: 3
Record: 19-1-1, 3 KOs
Last: L (TKO7) Gabriela Fundora, April 19
Next: TBA
4. Gabriela Sanchez Saavedra Previous ranking: 4
Record: 12-6, 1 KOs
Last: L (TKO7) Gabriela Fundora, Nov. 2
Next: TBA
5. Laura Wollenmann Previous ranking: 5
Record: 11-1, 3 KOs
Last: W (UD10) Karol Mazariegos Gonzalez, Dec. 14
Next: TBA
JUNIOR FLYWEIGHT (Up to 108 pounds)
1. Evelin Bermudez Previous ranking: 1
Record: 21-1-1, 7 KOs
Last: W (UD10) Tenkai Tsunami, March 8
Next: TBA
2. Jessica Nery Plata Previous ranking: 2
Record: 30-2, 3 KOs
Last: W (SD10) Sarah Bormann, Dec. 16, 2023
Next: TBA
3. Lourdes Juarez Previous ranking: 3
Record: 38-4, 5 KOs
Last: W (TKO9) Mirna Sanchez, March 7
Next: TBA
4. Sara Bailey Previous ranking: 4
Record: 6-0, 0 KOs
Last: W (UD10) Cristina Navarro, March 7
Next: TBA
5. Kim Clavel Previous ranking: 5
Record: 21-2, 3 KOs
Last: W (UD10) Anabel Ortiz, Feb. 27
Next: TBA
STRAWWEIGHT (Up to 105 pounds)
1. Yokasta Valle Previous ranking: 1
Record: 33-3, 10 KOs
Last: W (SD10) Marlen Esparza, March 29
Next: TBA
2. Sarah Bormann Previous ranking: 2
Record: 20-1, 7 KOs
Last: W (SD10) Isabel Rivero, April 26
Next: Sept. 13 vs. TBA
3. Sol Cudos Previous ranking: 3
Record: 10-0-2, 3 KOs
Last: W (SD10) Maria Sol Baumstarh, April 5
Next: TBA
4. Yuko Kuroki Previous ranking: 4
Record: 24-8-2, 10 KOs
Last: W (UD10) Ye Kyeng Seo, Jan. 21
Next: June 26 vs. Nanako Suzuki
5. Tenkai Tsunami Previous ranking: 5
Record: 32-14-1, 19 KOs
Last: L (UD10) Evelin Bermudez, March 8
Next: TBA
Editor's note: Seniesa Estrada announced retirement on Oct. 23 and was removed from the rankings.
ATOMWEIGHT (Up to 102 pounds)
1. Tina Rupprecht Previous ranking: 1
Record: 15-1-1, 3 KOs
Last: W (MD10) Sumire Yamanaka, April 5
Next: TBA
2. Sumire Yamanaka Previous ranking: 2
Record: 8-1, 3 KOs
Last: L (MD10) Tina Rupprecht, April 5
Next: TBA
3. Eri Matsuda Previous ranking: 3
Record: 7-2-1, 1 KO
Last: L (UD10) Tina Rupprecht, Nov. 23
Next: TBA
4. Esneidy Rodriguez Olmos Previous ranking: 4
Record: 9-0-1, 0 KOs
Last: W (1D10) Sana Hazuki, Dec. 12
Next: July 26 vs. Wisuta Sririttidet
5. Watcharaporn Namphon Previous ranking: 5
Record: 13-1, 8 KOs
Last: W (UD4) Chutinan Khonghoi, April 5
Next: TBA