Napoli and Juventus are said to be tracking the progress of Benfica and Portugal international defender Antonio Silva.
The centre-back only turned 19 just over a month ago and recently signed a new contract with his club until June 2027.
According to the Corriere dello Sport and A Bola, after Juventus showed interest in him earlier in the season, now Napoli are also keeping a close eye on the situation.
Antonio Silva is part of the World Cup squad and has played their 2-1 group game defeat to South Korea for the full 90 minutes.
That was his second cap for his country at senior level.
Despite being a central defender, Antonio Silva has scored two goals this season, including one in the 4-3 win over Juventus in the Champions League.
Benfica ended up topping that group on goal difference ahead of Paris Saint-Germain and will face Club Brugge in the Round of 16.