Another (sort of) translation! This one actually came first. Again with the fast-and-easy paraphrasing, so there may well be outright mistranslations. The inner dialogue is untranslated for now, because I left my lyrics booklet at home, but I would like to attempt it sometime.

From the fifth Prince of Tennis musical, here is

Aitsu Koso ga Tenisu no Oujisama - He is the Prince of Tennis

-

Momoshiro:
Go, Echizen! Our world rests
in your moving hand

Kawamura:
Jump, Echizen! Be fearless
Show us your COOL GUTS

Inui:
That's it, Echizen!
[[? '[lighting] mimagou.']]
Decide it with your twist serve

Kikumaru:
Good, Echizen! You're too fast for our eyes to follow
Punch him with a speedy smash

Kaidou:
GO, Echizen! Use your determination
To master a new art

Oishi:
Alright, Echizen! You're not backing down
There's nothing you can't accomplish

Fuji:
Everyone
is gazing at you
Your tennis is
the pinnacle of art

Tezuka:
Become
Seigaku's pillar
Show us
the way to glory

Mizuki:
How typical of you, Echizen Ryoma
With your high level of TECH, you're heating up this match
Watching you excites me
Your performance is magnetic
BEST TENSION
BEST CONDITION
YOU ARE THE BEST
YOU ARE THE PRINCE OF TENNIS

Hiyoshi:
This is gekokujyo
I'll destroy you and rise up to the top
I love chasing down my opponents
and catching up to, then striking them

Echizen:
You may call it gekokujyo, but
your tricks don't work on me
The stronger my opponent is
the easier it is to block the charge of his sword

Hiyoshi:
This is gekokujyo
This is gekokujyo
I'll destroy you!

Dan:
You're my inspiration, Echizen Ryoma
your steady gaze isn't wavering
I get excited just watching you
your performance is magnetic
BEST TENSION
BEST CONDITION
YOU ARE THE BEST
YOU ARE THE PRINCE OF TENNIS

Akutsu:
Your earnest attitude
is enough to make me sick

Sengoku:
But it has the power to move people's hearts
What is it about your aura?

Akutsu:
You force me to think about other people
and the consequences of my actions

Sengoku:
Your brightness
eclipses the stars

Dan, Sengoku, Mizuki:
Instead of being awkward, your title
has come to suit you
There's no doubt
You are the prince of tennis

Akutsu, Dan, Sengoku, Mizuki:
YOU ARE THE PRINCE OF TENNIS

BEST TENSION
YOU ARE THE
BEST CONDITION
PRINCE OF TENNIS
YOU ARE THE BEST
YOU ARE THE
YOU ARE THE PRINCE OF TENNIS