De Bruyne has said in an emotional message to City fans on social media: "Dear Manchester. Seeing this, you probably realise where this is heading. So I'll get straight to it and let you all know that these will be my final months as a Manchester City player.
"Nothing about this is easy to write, but as football players, we all know this day eventually comes. That day is here - and you deserve to hear it from me first.
"Football led me to all you and - and to this city. Chasing my dream, not knowing this period would change my life. This city. This club. These people... gave me EVERYTHING back! And guess what - we won EVERYTHING.
"Whether we like it or not, it's time to say goodbye. Suri, Rome, Mason, Michele and I are beyond grateful for what this place has meant to our family. 'Manchester' will forever be on our kids' passports - and more importantly, in each of our hearts.
"This will always be our HOME. We cannot thank the city, club, staff, teammates, friends and family enough for this 10-year ride.
"Every story comes to an end, but this has definitely been the best chapter. Let's enjoy these last moments together! Much love, Kevin."