Wordwizard

1) My favorite team let me down this weekend. They lost four-nil.
2) My favorite team disappointed me this weekend. They lost four-nil.

I think 'let down' is usually used when something has been promised, and yet I find '1' correct. I think '2' is correct too, but sounds less natural to me.

Are they both correct?
Do they mean exactly the same?

Gratefully,
Navi

General expectations can be let down as well. It's not just failures to keep promises that can lead to let-downs.

Both versions sound fine to me; 1) is more colloquial. No discernible difference in meaning unless the speaker of 1) actually lost money, or a bet, as a result of the losing score.