The Russian billionaire marks a decade in charge of the West London outfit today, where he has witnessed the club win 11 trophies, including three Premier League titles.
"What came through to me loud and clear in those early days was the new owner's passion for the game and potential he saw for what Chelsea FC could achieve, both on and off the pitch," Buck wrote in The Times.
"Will Roman Abramovich become bored, having won all the major trophies? My answer is no. Can Jose Mourinho bring more success to the club? My answer is yes."