Chelsea youngster loanee Islam Feruz started his youth career with Celtic before joining Chelsea in 2011 after rejecting a professional contract with the Scottish giants.
The former Hibernian midfielder spent the last two seasons in Greece, England and Scotland on loan from the Blues.
The 21-year-old told the Daily Mail: “I’m not going into every detail but if I could turn the clock back then I would definitely have stayed at Celtic for longer,”
“That would have given me more experience and a better chance of playing first-team football”.
Feruz is currently spending the season on loan at Belgian Pro League side Royal Mouscron-Péruwelz.
“Listen, I had my head turned at 15 years of age. I didn’t realise there was money involved in football. I just played football for the love of the game”.
“There is no doubting my ability as a footballer. I’m only 21. What I have to do is show everyone that I have matured. There are many things in my life I’d do differently. Yes, I’ve done things I’m not proud of”.
Then Chelsea youngster added: “The only thing that keeps you happy is playing football. I am wiser and doing things differently.”