Another month coming to a close means more movement across all weight divisions within the four major sanctioning bodies. Canelo Alvarez's undisputed super middleweight reign may have ended on September 13, though the longtime champion has been inserted as the WBO's No. 1-rated contender after receiving the same distinction with the WBC last week.

Junto Nakatani will soon be starting camp - if not already underway - ahead of his eagerly-anticipated junior featherweight debut on a Riyadh Season show topped by Naoya Inoue-David Picasso come December 27, as he hopes to secure an all-Japanese superfight.

The three-division world champion, who recently relinquished his bantamweight belts, has been slotted into top billing with the WBO for Inoue's title. The WBA made the same decision in last month's ranking update, before the 27-year-old's weight move was official.

Speaking of moves, former WBO lightweight champion Keyshawn Davis has seen his wish granted after petitioning the sanctioning body to insert him as the top-rated contender at 140-pounds.

A forgettable weight miss before his homecoming against Edwin De Los Santos June 7 saw him lose the 135-pound title on the scales three months ago and now, an eliminator with No. 2-rated contender Alfredo Santiago (17-2, 8 KOs) may be ordered shortly.

Elsewhere, one-time world title challenger Richard Riakporhe (18-1, 14 KOs) has at last moved from cruiserweight to heavyweight in the WBO ratings, sitting at No. 12 ahead of his return on the Chris Eubank Jr-Conor Benn 2 undercard come November 15.

There's movement Down Under as Michael Zerafa and Nikita Tszyu have both received ranking boosts a division apart after their respective stoppage victories recently, even as a potential matchup between the pair continues to rumble on.

Osaka southpaw Toshiki Shimomachi (22-1-3, 12 KOs) is another newcomer at 122-pounds after his eight-round win over Han Sol Lee on the Inoue-Akhmadaliev undercard earlier this month, now rated No. 4 in a division where his older compatriot continues to dominate.

Now-former champion Yoshiki Takei, who suffered a fourth-round upset stoppage loss to Christian Medina as part of the aforementioned bill, sits fourth in the 118-pound division as he'll look to rebuild from a stunning career-first defeat.

Middleweight: Zerafa has risen three places to No. 8 in the 160-pound division, changing places with unbeaten British contender Shakiel Thompson before the Sheffield man's return in an eight-round contest against an unheralded journeyman this weekend.

Austin 'Ammo' Williams has switched places with Cesar Mateo Tapia to No. 9, while DR Congo's Patrick Mukala replaces Hassan Mwakinyo at No. 15 as he nears a year's inactivity.

Junior welterweight: All of the previously ranked top-5 contenders have dropped down a place to make space for the aforementioned Davis, while Aram Faniian, Jose Carlos Ramirez and Ernesto Mercado have all fallen two spots. Movladdin Biyarslanov appears to be venturing down the WBC route and was previously rated No. 14, but is out of the rankings.

Junior featherweight: Although questions remain about his next move, former IBF beltholder Luis Alberto Lopez rises two spots to No. 9, replacing his compatriot and the now-omitted Jorge Mata Cuellar after his defeat by Mark Magsayo two months ago.

Speaking of Magsayo, Liam Wilson moved above him to No. 3 while Dominican southpaw contender Eridson Garcia is a new entrant at No. 11 after a third-round stoppage win over Cristian Perez Hernandez this month to clinch the vacant WBO NABO title at 130-pounds.

Bantamweight: Longtime junior bantamweight champion Carlos Cuadras joins former beltholder Takei as a new entrant in the top-10, sitting pretty at No. 7 - he's still rated in the division below by The Ring at the time of writing. Charlie Edwards drops one spot to No. 8, while Michael Angeletti - ranked higher with the WBA (6) and IBF (9) - fell by four to No. 12.

Flyweight: Anthony Olascuaga has a new No. 1 contender in a busy rankings shift at 112-pounds after skilfully dismissing Juan Carlos Camacho-Rivera in two rounds this month.

Argentina's Tobias Jeremias Reyes (17-1-1, 16 KOs) is that man, four months after winning the WBO's Latino flyweight crown. He'll return again next month on home soil, while Japan's Seigo Yuri Akui (21-3-1, 11 KOs) is the biggest mover - a whopping nine places to No. 3.