Sergio Martinez wins, but slips

Who is the world's best fighter, regardless of weight class? Check out ESPN's top 10, which saw no movement this week despite Canelo Alvarez finally authoring a signature win. If you have a comment about the rankings, please use #ESPNP4P on Twitter.

Don't forget to check out Dan Rafael's divisional rankings, which are updated weekly.

For a list of the current champions in all weight classes, click here.

Note: Results are through April 29.