The England defender is set to face stiff test from the Italian forward when they meet in the Champions League opener later tonight.
And discussing the qualities of difficult to control Insigne, Arnold believes he possesses the same features as Real Madrid's Eden Hazard.
"Obviously he's a really good player.
"He's someone who really helps them play football, understands the way that they want to play, really encourages the team to play out, able to hit [it to] him and he'll be able to hold the ball up," the right-back told UK media, via the Liverpool Echo.
"He's a really tricky player, really strong, fast, quite agile. He's kind of like Eden Hazard I'd say, that type of player who is tricky to get hold of and mark. Coming up against him is always a tough test but they are the things that you expect in the Champions League.
"He's a great player, probably a little bit underrated in terms of the respect and the plaudits that he gets, but he's a real fantastic player.
"I think his team-mates will say the same and the people that come up against him will say how tricky he is to actually nullify. He's a good player, they've got many a good player and we need to be ready for that."
