Hojlund, who is on loan from Manchester United, scored both goals in the 2-1 victory.
Capello praised Hojlund's speed and ability to make attacking runs deep into the opponent's half, which he first noticed during Hojlund's time at Atalanta.
He said Hojlund is a strong and courageous player who is a threat to his opponents, and is happy to see him back in good form in Naples.
Capello also mentioned that Hojlund struggled at Manchester United, making mistakes and missing many chances.
Napoli teammate Kevin de Bruyne also praised Hojlund, saying he has a lot of quality and is similar to Erling Haaland in terms of his playing style.
De Bruyne believes Hojlund's performance was great and that he will help Napoli score many more goals.