You're good, Spaniard, but you're not that good. You could be magnificent.

7 seconds sound clip from the Gladiator (2000) movie soundboard.

You can hear this line at 01:12:33 in the Blu-ray version of the movie.

Quote context

[...]

(CROWD CHEERING)

- Are you not entertained? Are you not entertained? Is this not why you're here?

- Spaniard! Spaniard! Spaniard! Spaniard! Spaniard! Spaniard!

- What do you want? Girl? Boy?

- You sent for me.

- Yes, I did.

- You're good, Spaniard, but you're not that good. You could be magnificent.

- I'm required to kill, so I kill. That is enough.

- That's enough for the provinces, but not for Rome.

- The young emperor has arranged a series of spectacles to commemorate his father, Marcus Aurelius.

- I find that amusing, since it was Marcus Aurelius, the wise, the all-knowing Marcus Aurelius, that closed us down.

[...]