Benfica sporting director Rui Costa has heaped praise on the club's "extraordinary" star Joao Felix and has admitted they will struggle to keep hold of him this summer.
The 19-year-old has enjoyed a breakthrough campaign with Benfica and is considered one of European football's most exciting prospects.
Speaking to Tuttosport (h/t Chris Burton of Goal), Costa commented on the talent of Felix and the €120 million (£103 million) release clause he is said to have in his contract at the Estadio da Luz:
"Someone called him my heir. Or the new Kaka.