The former Arsenal and Tottenham man was given his first chance in management on Wednesday, when he was handed the job at League Two side Macclesfield.
Speaking to 'Sky Sports', two of his former team-mates gave their backing to Campbell, but admitted that it may be a challenge for him to get used to being in the fourth tier of the game.
"He will do it his way but big the question for Sol is can he get down to their level? He's gone to a level where he needs to know the league, where a No 2 could be vital for him," Ray Parlour, who played with Campbell at Arsenal, said.
Danny Murphy, who was part of England squads with Campbell, thinks that his tactical knowledge will be a great asset in the job.
November 27, 2018
"He's got to try something different and he's got a strong belief in himself," the former Liverpool midfielder said.
"I remember in England squads where I sat down and talked to him a few times, and he's a thoughtful guy. He's very into the tactical side, the mentality of players."
"Sometimes it takes something different for players to refocus or change their mentality and when you're at the bottom, Sol has probably looked at it as nothing to lose. If he turns it round, he looks like a miracle worker."