Board Thread:Naruto Discussions/@comment-32900772-20170904113855/@comment-25227224-20170905175323

Madara wasn't invincible he was literally moments from being defeated by Naruto and Sasuke. Seeing the skills and power Naruto and Sasuke showed in their final fight (after the battle with Kaguya) they both illustrated that they were capable of beating the 'invincible' Madara.