The WBA’s latest ratings update – released May 1 – includes the installation of one new No. 1 contender.

At junior flyweight: The first spot had been vacant ever since December, when the previous No. 1, Erick Rosa, defeated Neider Valdez Aguilar to win the vacant WBA title.

It is vacant no more. 

Kyosuke Takami, previously ranked fifth is now rated first by virtue of the sixth-round technical knockout he scored in April over the unranked Toshiki Kawamitsu. 

That sent Takami leapfrogging over the three men ahead of him: Arvin Jhon Paciones (No. 2), Shokichi Iwata (No. 3) and Sergio Mendoza Cordova (No. 4).

The WBA’s titleholders and No. 1 contenders in each weight class are:

Heavyweight: Oleksandr Usyk has the WBA, WBC and WBO world titles; Kubrat Pulev has the WBA’s secondary “regular” belt; Fabio Wardley is the No. 1 contender. Usyk is scheduled to face IBF titleholder Daniel Dubois on July 19 for the undisputed championship. Wardley has a June 7 date against an opponent to be determined, who will replace Jarrell Miller.

Bridgerweight: Muslim Gadzhimagomedov has the WBA title; Julio Cesar La Cruz is his No. 1 contender.

Cruiserweight: Gilberto Ramirez has the WBA and WBO world titles; Yuniel Dorticos is the WBA’s No. 1 contender. They are scheduled to fight on June 28.

Light heavyweight: Dmitry Bivol has the IBF, WBA and WBO world titles. David Benavidez is both the WBA’s secondary “regular” titleholder and is therefore the WBA’s mandatory challenger – and he is also now the WBC’s primary titleholder, as Bivol vacated that sanctioning body’s belt. Artur Beterbiev is the No. 1 contender for the WBA, WBC and WBO belts. Bivol and Beterbiev are expected to fight their rubber match later this year.

Super middleweight: Saul “Canelo” Alvarez has the WBA, WBC and WBO world titles; Caleb Plant is the WBA interim titleholder and is ostensibly the mandatory challenger for Canelo. Christian Mbilli is the WBA’s and WBC’s No. 1 contender. Canelo is scheduled to face IBF titleholder William Scull on May 3 for the undisputed championship.

Middleweight: Erislandy Lara has the world title; Yoenli Hernandez is his No. 1 contender.

Junior middleweight: Terence Crawford has the world title; Jermell Charlo is the “champion in recess” and would be in line for a title shot if and when he returns to the division; Yoenis Tellez is the WBA’s interim titleholder. Abass Baraou is the No. 1 contender.

Welterweight: Jaron “Boots” Ennis has the IBF and WBA world titles; Shakhram Giyasov is the WBA’s No. 1 contender.

Junior welterweight: Gary Antuanne Russell has the world title; Andy Hiraoka is his No. 1 contender. 

Lightweight: Gervonta Davis has the world title; William Zepeda is his No. 1 contender and is also the interim WBC titleholder. Zepeda is scheduled to challenge WBC titleholder Shakur Stevenson on July 12.

Junior lightweight: Lamont Roach Jnr has the world title; Albert Batyrgaziev is the interim titleholder and is ostensibly the mandatory challenger for Roach; Elnur Samedov is the No. 1 contender. 

Featherweight: Nick Ball has the world title; Mirco Cuello is his No. 1 contender. 

Junior featherweight: Naoya Inoue has all four world titles; Murodjon Akhmadaliev has the WBA’s interim title; Ramon Cardenas is the No. 1 contender. Inoue is scheduled to defend against Ramon Cardenas on May 4.

Bantamweight: Seiya Tsutsumi has the world title; Antonio Vargas is the interim titleholder; the No. 1 slot is currently vacant

Junior bantamweight: Fernando Martinez has the world title; David Jimenez is the interim titleholder and is ostensibly the mandatory challenger for Martinez; Roman Gonzalez is the No. 1 contender for the WBA, WBC and WBO. 

Flyweight: Kenshiro Teraji has the WBA and WBC world titles; Yankiel Rivera is the WBA’s No. 1 contender.

Junior flyweight: Erick Rosa has the world title; Kyosuke Takami is his No. 1 contender.

Minimumweight: Oscar Collazo has the WBA and WBO world titles; Yuni Takada is the WBA’s No. 1 contender.

David Greisman, who has covered boxing since 2004, is on Twitter @FightingWords2. David’s book, “Fighting Words: The Heart and Heartbreak of Boxing,” is available on Amazon.