DB Chapter 176
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
"Goku vs. Tenshinhan" (孫悟空ＶＳ天津飯, Son Gokū Bāsesu Tenshinhan; Literally meaning "Son Goku vs Tenshinhan") is chapter 176 of the Dragon Ball manga.
The best four contestants have progressed to the semi-finals; Tenshinhan, Son Goku, Piccolo, and Shen. The first semi-final match is between the two finalists from last time, with Tenshinhan being the winner. Goku asks Tenshinhan if they should jump in the ring, and he says of course. So, they each hop out to the ring in a cool little flip, and then stare each other down. Tenshinhan wants Goku to show him the fruits of God's training, and the announcer calls for the match to begin.
The two of them come at each other, and Goku blocks an elbow with his knee. Tenshinhan strikes at Goku a few times, but Goku backflips out of the way, then jumps up into the air. Tenshinhan fires a blast up at him, so Goku knocks it back down his way, but Tenshinhan swats it aside and continues coming up toward Goku. Tenshinhan and Goku strike at each other mid-air, and keep doing so as they fall back toward the ground.
Then they break once they reach roof level, and kick off the ground once they land. The two of them continue the fight at a level too quickly for the spectators to see, although Piccolo, Kuririn, and Yamcha can keep up just fine. Then Goku and Tenshinhan come back into view, and rush at each other with their hands out. Their hands clasp, and so they're locked in a test of strength. Goku wins it by leaning back and kicking Tenshinhan into the air.
Tenshinhan comes back down in a flash, and rushes at Goku, but Goku just barely jumps over it. Tenshinhan comes after Goku, moves behind him, and then swipes at Goku, but only to hit an afterimage. The real Goku is behind him, and then they smirk at each other, with Tenshinhan a bit out of breath. The announcer thinks they're pretty even, but Kame-Sen'nin notes that Goku is not a bit out of breath.