Bale has scored eight goals in his last six games, revelling in a new role behind the main striker, but AVB insists Tottenham are not a one-man team.
He said: "Messi has scored 91 goals, take that away and see where Barcelona finish.
"From the first training session we had here we were immediately impressed by Gareth.
"Fortunately for us we were able to discover this form that he has playing through the middle.
"At the beginning of the season we tested it as he had never played as a striker before. It is a credit to him that in one month he was able to change from one position to perform at this level."