When two powerful forces with opposite ideals come face to face, it's time for a showdown.
We sat down face to face.
We stood face to face.
I would like to talk to him face to face.
I complained to him face to face.
Stand face to face.
We stood face to face with death.
I have something to talk over with you, face to face.
He was face to face with his enemy at last.
These things are much better spoken about face to face so that we can draw diagrams and demonstrate timings on logic analyzers and oscilloscopes where necessary.