If that happened, I'd be at your mercy.
4 seconds sound clip from the King Boxer: Fingers of Death movie soundboard.
You can hear this line at 00:04:19 in the Blu-ray version of the movie.
Quote context
[...]
- Oh. Well, with a teacher like that, you must have improved a lot.
- By next year, you'll be good enough to be in the tournament.
- If I am able to, I'd like to have a go.
- Just think what a match it would be, if you two had to compete. That would be something.
- If that happened, I'd be at your mercy.
- Not at all. You could teach me a lot.
- All right. Later. I'd be interested to see how you're getting on.
- Uh, Ta-ming had three years of training, with Suen Hsin-Pei. It's made a big difference.
[...]