Naruto Shippuden Episode 28

Title: "The Revived Beasts"
Date: September 13, 2007

Team Guy's fight continues as they fight their respective clones. Neji explains to each member of the team that they are growing weaker and weaker as the fight drags on and they become fatigued. Their clones, being non-human, remain as strong as they were when they were formed. Lee realizes that the only way for them to defeat their clones is to become stronger than they were when they first started fighting. After a flashback about their training sessions, they all remember that they resolve to constantly become stronger. The memory gives them the strength needed to overpower and defeat their clones with new techniques that they devise.