Kevin De Bruyne has no regrets about leaving Chelsea after hitting the winner in Manchester City's 1-0 victory at Stamford Bridge on Saturday.
The Belgium international has been in fantastic form this season, scoring two goals and setting up eight in all competitions, and his 67th minute strike ensured City go into the international break top of the Premier League.
De Bruyne left Chelsea in 2014 after just three Premier League appearances in two years, and after rebuilding his career at German club Wolfsburg, moved to City 18 months later for a reported £55 million fee.
"I've no regrets over anything that happened," the 26-year-old said after the win over last season's champions.
"I don't think they have regrets -- they've won two league titles since I've been gone, so they've done fairly well.
"That's the way it goes, it's a business. At that point it was a good decision for me to go and maybe for them it was also good to let me go.
"There's no bad feeling at all. It's just part of life and you need to grow up."
City have made an impressive start to the season, drawing just one of their opening 10 games in all competitions, and De Bruyne believes his teammates are starting to get used to Guardiola's demands.
"It's the way we started to play last year but, obviously, you get some growing pains," he added.
"If somebody makes a mistake, then it looks a little bit silly but it takes hard work. Don't think it comes easy.
"It can be more difficult to do the pressing against [lesser] teams because you know they're going to play the long balls, so the pressing has to be different and you have to manage the space."