The striker left Manchester United for Napoli before Monday's deadline. Riemer is confident Hojlund can rediscover his best form after his success with Atalanta.
He said, "I think Hojlund's move to Italian football is an exciting one. That's where he found his big international breakthrough, and now he has the opportunity to return to where things worked. I expect him to reach the level he showed last time in Serie A. He's moving towards something different from the environment he comes from.
"I'm looking forward to following him, because he's an interesting choice. Thanks to his combination of speed, physical strength, and an eye for goal, Hojlund is the prototype of a successful striker in Serie A."
Riemer also said: "There are many aspects that make him ideal for Serie A. If you look at his playing style, he has always adapted to the type of player Rasmus is. It's a good start. And he's already shown he can score goals in that league. He's shown he can give his best in this environment and he's coming to a club that's working well, and that's also crucial for me."