Chelsea's former chief scout and director of youth development Frank Arnesen claims the clubâ€™s pursuit of instant success meant there was no chance for young players to make their mark on the first team during his time at Stamford Bridge.
Speaking to the London Evening Standard, Arnesen said: "At Chelsea, we had fantastic talent, we built up marvellous players, but they needed to be given a chance and they never were. The pressure is so big.
"Managers in England are going out and buying players, the level is high, and it is difficult for them because if they lose two or three games, they are gone."
Arnesen, however, insists his time at Chelsea was well spent.
He added: "I am very proud of what I did. I did a fantastic job. I made the club a lot of money. I bought players for small amounts and they were sold for a lot of money.
"I am talking about players like [Daniel] Sturridge, [Fabio] Borini and [Miroslav] Stoch - they ended up being sold for about Â£30million and that pays for the academy.
"I am happy with many of the players I signed for Chelsea; just think, Borini and Sturridge are now at Liverpool, Stoch scored the FIFA goal of the year for Fenerbahce, Nemanja Matic is the star man at Benfica.