The 25-year-old has been in sensational goalscoring form for Jurgen Klopp's side since he arrived from Roma last summer, notching 36 goals across all competitions.
“With Salah it’s good to have a bit of pace with him, you’ve got to have quick feet as well as a defender because he likes chopping and changing,” Campbell told SkySports.
"You’ve got to have good anticipation against him, if you haven’t he will just do you, he’ll set you up.
“Also I think you’ve got to go out to him quicker, don’t let him build up a pace to turn you inside out at that pace.
“If you get out to him quick enough, you can kind of slow him down a bit before he comes to you in the box. Once he’s in the box, he’s the master.”