In 2005, Ba and two other young stars travelled to England.
He was banging in the goals for Rouen at the time but his ambitions were far greater.
He explained to the Daily Star: "Three of us came over looking for glory or success. It was an adventure.
"Some of the trials were planned like the ones I had at Barnsley and Swansea, while the one at Watford just happened like that.
"Unfortunately the guys I was with didn't really make it, but I came back to France with an experience. I had learned a lot of things that helped me at the beginning of my career.
"I know why I was there, and the objective was to finish in a club like Chelsea."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball