Hojlund, who is on loan from Manchester United, has made a strong impact in the Serie A season so far.
Riemer praises Hojlund's ability to adapt quickly to his new team and become a key player.
The coach is happy to have a striker in top form available for the national team and considers Hojlund to be an excellent player.
Riemer notes that it's not easy for a player to join a top team like Napoli, especially when they are expected to perform well.