to sb's face
If you say something unpleasant to someone's face, you say it to them directly, when you are with them:
If you've got something to say, say it to my face.

[TahlilGaran] Advanced Learner's Dictionary ▲

to face
to (someone's) face
if you say something unpleasant to someone's face, you say it to them directly, without worrying whether they will be upset or angry.
Everyone refers to him as 'Junior' but no one would dare call him that to his face.

to (your) face
directly to you.
I already knew the answer, but I wanted him to say it to my face, even if it embarrassed him.

[TahlilGaran] English Idioms Dictionary ▲

to one's face
adv. phr. Directly to you; in your presence.
I told him to his face that I didn't like the idea.
I called him a coward to his face.
Compare: IN ONE'S FACE.
Antonym: BEHIND ONE'S BACK.

[TahlilGaran] English Idioms Dictionary ▲

to someone's face
to (someone's) face
if you say something unpleasant to someone's face, you say it to them directly, without worrying whether they will be upset or angry.
Everyone refers to him as 'Junior' but no one would dare call him that to his face.

to (your) face
directly to you.
I already knew the answer, but I wanted him to say it to my face, even if it embarrassed him.

[TahlilGaran] English Idioms Dictionary ▲