Dragon Ball Kai

Goku jumps into battle against Frieza, and quickly proves to be more of a challenge than Frieza thought. The two exchange powerful blows and discover that their levels of strength are nearly equal. As Goku and Frieza attempt to one-up each other, Gohan, Krillin, and Piccolo back away to watch the battle from a safe distance, while Yamcha, Tien, and Chiaotzu watch from King Kai's planet in the Other World. At one point during the battle, Goku is able to take advantage of Frieza's inability to sense another's ki, but Frieza counters this by trapping Goku in an exploding ball of energy that nearly kills him, with Goku managing to break free at the last possible moment. However, Piccolo states that even after all this, neither Goku nor Frieza are fighting at full power just yet.