I never said to play Young or Mata, I said our forwards. It's inevitable that Liverpool will press high, which will leave our centre backs to play long balls. Now, there's nothing wrong with long balls, as long as they're played into the right area. Say if we do play a 4222, then I'd like to see our front two of Lukaku and Martial/Rashford/Sanchez to drift wide and run channels, as I explained before. See how Palace played against and troubled City. Very unlucky not to win.
Salah does play a bit closer to the line, but playing Darmian wouldn't change that. Yes, defensively he's the best choice, but hoping we don't just have our left back to defend. I'm hoping we can drag Salah back a bit. Make him defend. That said, Young will be fine against Salah. He played against City and he was fine against Sterling/Sane.