The Challengers!! could refer to either a chapter or a volume:

• Chapter 39. The Challengers!! (挑戦者たち!!, Chōsensha-Tachi!!)
• Volume 5. The Challengers!! (挑戦者たち!!, Chōsensha-Tachi!!)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.