Pep Guardiola expects it to take time before Tottenham begin to play in Jose Mourinho's image.
Manchester City manager Guardiola and Mourinho renew a long-time rivalry as the champions travel to Spurs in the Premier League on Sunday.
Mourinho returned to the game after almost a year out when he took over at the London club last November following the sacking of Mauricio Pochettino.
Guardiola and Mourinho had an intense rivalry when they were in charge at Barcelona and Real Madrid respectively. They came up against each other again in Manchester in 2016 when they took over at City and United.
Yet while their careers have intertwined, Guardiola insists it is not something he gives much thought.
He said: "I think with him or without him I try to do my best. When we faced in Madrid or here it's because he has top teams, so I have to learn what he does.
"But without him, I think I would have done the same. It would have been another rival."