Campbell says the move would be similar to his free transfer from Tottenham to Arsenal in 2001. But he does not think Alderweireld will make a similar move.
The former England international told Express Sport: "I think my situation was different. I was much younger.
"If a team wants you bad enough they'll make it happen and come to a compromise and either he'll stay at Tottenham or he'll move on.
"I don't think Tottenham will allow him to drift on for 18 months, a deal will be struck either way."