in someone's corner

in (one's) corner

Giving one's full support to someone. I'm nervous about the trial, but I'm glad I have you in my corner. I feel a little bad that he's going into the meeting with no one in his corner.
See also: corner
Farlex Dictionary of Idioms.

in someone's corner

on someone's side; giving someone support.
This idiom and fight your corner are boxing metaphors and refer to the diagonally opposite corners taken by opponents in a boxing match. Trainers and assistants are in a boxer's corner to offer support and encouragement between rounds.
See also: corner
Farlex Partner Idioms Dictionary
See also:
  • be out of (one's) head
  • (it's) good to hear your voice
  • (something) is over (one's) head
  • be at a disadvantage
  • be on the ball
  • at a disadvantage
  • address comments or remarks to
  • address (one's) comments to (someone or something)
  • address (one's) remarks to (someone or something)
  • be in it for