The goalkeeper was unveiled at the Lane on Thursday after becoming our first Bosman-style free transfer with his switch from Wimbledon. After 16 years with the Dons, Sullivan admitted the time was right to hit the big time.
He said: "I want to keep improving, to keep learning and that’s why I believed the time was right for me to move on from Wimbledon. I didn’t want to finish my career having to look back and think ‘what if I played on the bigger stage?’
"I want to be on that stage, win things and improve as a goalkeeper and I think I can do all that here. Everyone knows Tottenham is a massive club who certainly haven’t had their day. The positive thing about what is happening now is that they clearly want that success back.
"George Graham will not be happy with finishing mid-table, he wants to be up there in Europe and competing for all the trophies. I am very ambitious as well and want success. That is what won me over, the ambition and personnel at the club.
"I spoke to George Graham, David Pleat and Chris Perry and they were all full of admiration and praise for the club. They want to succeed."
Sullivan’s immediate challenge will be to upstage the current leading man in goal, last season’s number one Ian Walker. He knows that spot is up for grabs, despite such a high-profile move.
"I know it’s not going to be easy but I needed a change from Wimbledon and needed a challenge and that is exactly what I’ve got here."
Neil Sullivan knows he has stepped on to the big stage — now he wants a leading role in the White Hart Lane revolution.