Vertonghen could not praise Dutchman Jol enough for the work he did with him when they were at Ajax.
Jol stayed only 18 months there but Vertonghen said: "I played for him and he gave me a lot of confidence. He helped me to become the player I am.
"He can motivate the team and individual players, and he also helped the like of Luis Suarez.
"He found my best position for me. Before he came I was a midfielder or left-back. He made me a centre-half. When he became manager I made the most progress as a player in his first season."