The Transnational Boxing Rankings Board's latest rankings- those based on fights held through August 28, 2021- were posted on the TBRB's website August 31, 2021. There were changes in the Top Tens of the welterweight, junior welterweight, and junior bantamweight divisions.

WELTERWEIGHT:

Champion: OPEN

1 (1) Errol Spence, Jr.
2 (2) Terence Crawford
3 (3) Yordenis Ugas
4 (4) Shawn Porter
5 (5) Danny Garcia
6 (6) Vergil Ortiz, Jr.
7 (7) Jaron Ennis
8 (8) Manny Pacquiao
9 (10) Kudratillo Abdukakhorov (Qudratillo Abduqaxorov)
10 (-) Jamal James

Out from rankings posted August 31, 2021:
#9 Mikey Garcia (prolonged inactivity)

JUNIOR WELTERWEIGHT:

Champion: Josh Taylor

1 (1) Regis Prograis
2 (2) Jose Carlos Ramirez
3 (3) Jose Zepeda
4 (4) Viktor Postol
5 (6) Arnold Barboza, Jr.
6 (7) Gervonta Davis (is also ranked #2 at 130 and #7 at 135)
7 (-) Montana Love
8 (8) Robert Easter, Jr.
9 (9) Jack Catterall
10 (10) Subriel Matias

Out from rankings posted August 24, 2021:
#5 Ivan Baranchyk

JUNIOR BANTAMWEIGHT:

Champion: Juan Francisco Estrada

1 (1) Srisaket Sor Rungvisai
2 (2) Roman Gonzalez
3 (3) Kazuto Ioka
4 (4) Jerwin Ancajas
5 (5) Donnie Nietes
6 (6) Joshua Franco
7 (8) Francisco Rodriguez, Jr.
8 (9) Carlos Cuadras
9 (10) Andrew Moloney
10 (-) Pedro Guevara

Out from rankings posted August 24, 2021:
#7 Khalid Yafai (prolonged inactivity)