The true impact of City's staggering 5-1 August win at White Hart Lane took a long time to sink in. Looking back, it is as amazing as any other of the freak results that have littered the season given Tottenham have bounced back to become serious Premier League title contenders.
And, whilst Johnson is determined City should maintain their perfect home record in the league, the former Middlesbrough man accepts it will be much tougher, and said: "That was a one-off. We humiliated them with some of the football we played. I don't think many teams would have got close to us. The passing and movement was staggering."
He added: "But the fact is they have some top players, a squad packed with quality, and are playing much differently now."
Still, Johnson feels there is an anxiety in the Spurs camp about their true chances of overhauling City.
After all, Rafael van der Vaart wouldn't have started to question the Blues credentials if he felt they were no good.
"It shows we must be doing something right if people are talking about us all the time," said Johnson.
"If people weren't worried they would talk about themselves, so to find time to talk about us might show we are at the back of their minds."