Assuming Team Safe on both players?
It's still better when You have your own. I experienced a lot of rage just coz I hit someone in CQC with Hammer - I knocked down myself - and he/she finished Me with melee.
Step back ND. King is Back:
Someone mentioned that before, but it's very important, so I'll mention it again. Team Safe will help you do much better with it. You should always go to your enemys, shoot one bullet and then melee them or switch to your pistol, because the distance doesn't matter and since you can't get anything from your bullet, you'll survive it. If you're not close enough to melee him, switch to your pistol and then shoot him once.
Well to avoid a blindfiring situation stay in an open area so you won't get trapped, you have multiple directions to go. Jumping while firing also helps.