With Yang Hyun-jun inactive connected Asian Games work with South Korea, Sebastian Tounekti and James Forrest person some been utilized connected Celtic's near flank.
But Brown believes the club's problems spell beyond that.
"Rangers got successful their face, they blocked Callum McGregor disconnected and arsenic soon arsenic you artifact Callum McGregor disconnected and you man-mark Cal, it's hard for anyone other to spell and dictate.
"That's erstwhile you request a [Benjamin] Nygren to driblet under, a [Mika] Baur to spell and driblet nether and them bash their occupation arsenic well. You can't ever support looking astatine Cal to bash everything."
And Brown believes who starts champion could beryllium crucial.
"Rangers were up for the fight," helium added connected Sportsound. "The archetypal 15 minutes, it should beryllium a battle. If you tin spell and triumph that battle, you tin get the shot down.
"Celtic started very, precise dilatory past week. They request to spell backmost to basics, marque definite they've got the fight, marque definite they've got the hunger due to the fact that they've got the endowment - I cognize they've got the talent.
"You cannot person conscionable 1 of those days against your biggest rivals, ever."
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