Sporting Lisbon have produced some wonderful attackers over the years - Cristiano Ronaldo and Bruno Fernandes to name a few - but Nuno Mendes may be the best defender to ever come out of their academy.
According to reports in Portugal, several of Europe's elite clubs are monitoring the 18-year-old left back's situation in Lisbon, including Liverpool, Manchester United, AC Milan and Juventus.
It would take the activation of his sizeable £63million release to prise Mendes away from the Portuguese club, so just why is the teenage defender so highly rated?