Anthony Joshua has dropped to fifth in the WBA rankings after his loss to Oleksandr Usyk.
The Ukrainian defeated Joshua in their title fight at the end of September, and they have now agreed to a rematch in early 2022.
The manner of the defeat, with Usyk in control for much of the match, may have contributed to the governing body’s decision to put him well down in the top 10 rankings.
Deontay Wilder, another beaten champion, is in at number six.
The number one ranking is held by Daniel Dubois, with Hughie Fury also placed above Thomas.
American heavyweight is also placed above Joshua.
The deposed champion has been touring gyms in California and Texas ahead of an expected change or addition to his training team, as Joshua prepares to improve ahead of the rematch.
Should he succeed, that may tee him up for a much anticipated undisputed clash with WBC champion Tyson Fury.