Japanese to english translation please?

Question:

So i was wathcing a professional wrestling match and the announcer said, after the defending champions had won: "hachi boei ni seiko shimasa!"

I just wanna know what hachi boei ni seiko shimasta means because ive heard it quite frequently in championship matches

Answer:

You did not hear it correctly.

It was "hatsu boei ni seiko shimashita"

It means "(champion) successfully defended his title for the first time"