I don't know why the champion is fighting Balboa's fight.
4 seconds sound clip from the Rocky II movie soundboard.
You can hear this line at 01:53:13.629 in the Blu-ray version of the movie.
Quote context
[...]
- What's keeping these two guys up? A tremendous boxing moment.
- Here comes Balboa, but the champion's back with another left.
- They're standing dead in the center of the ring, toe to toe.
- I don't know why the champion is fighting Balboa's fight.
- A tremendous left to the head. A left. A left.
- Four!
- Get up, man! Get on your feet!
- Five!
- Now Balboa reaches for another!
[...]