Tottenham boss Mauricio Pochettino rates their academy as superior to Southampton's.
The St Mary's club have one of the most successful youth systems in Europe, but the Argentine believes Tottenham's is better.
"For us, it's very important to develop our young talent because we have an unbelievable academy and training ground, and we need to profit from it," said Pochettino.
"It is important because the academy is always the heart of any club. It was one of the main reasons I decided to come here. The opportunity to work with this club's academy was fantastic. I think it is the best in England, maybe even Europe."