"I remember when I was a young player at CSKA Sofia and the good life was all I was interested in. Celtic came in for me and I moved to Glasgow, to another country, to a new world. I didn’t speak the language and I thought it would never happen for me. I knew nobody.
Fortunately, I met people who helped me to turn my life around. I came to know great teammates who showed me the proper way, the way I had to be if I was going to be a serious professional and compete at a high level.
I came to appreciate so much the opportunity to work with that level of professional people because it made me something like them.
At Celtic Football Club and at Aston Villa Football Club I was privileged to live a life competing at a high level and playing the game I love, supported by the most passionate fans."
More top news
The new Bishop of Lichfield has been officially installed in a special service at the city's cathedral.
Personal photos of the Duchess of Cambridge and her children were reportedly among those offered for sale.
A dad from Redditch who bought a cell phone stun gun on holiday “for a laugh” has ended up with a five-year prison sentence.