Madueke left Chelsea for the Gunners this past summer, having spent the offseason working with his personal trainer of four years, Isaksson-Hurst.
He told The Sun: “The big misconception about Noni is his mentality.
“He’s like a mentality monster. In terms of mentality, I would liken that to Cristiano.
“He’s so focused and driven in terms of wanting to be the best and wanting to improve.
“We’ve been away in Marbella for five or six days. I’ve had to force him to have a day off and take a rest in between. He wants to work, he wants to do more, he wants to do the extras.
“When his peers are partying around the beach clubs in Marbella, he’s on the grass, training with me every day.
“I can only comment on what I see when he trains with me.
“I haven’t seen him when he’s with Chelsea, but when he’s been with me, he’s switched on, he works hard, he’s on it.”
Arsenal fans will love him
Of criticism of Madueke’s signing from some Gunners fans, Isaksson-Hurst said: “That’s water off a duck’s back.
“He takes that on board and it’s part of the game. That is not going to faze him and he wants to be a success there.
“Arsenal fans will come to love him, I’m sure. It’s close to the family home so he’s settled.
“Arsenal’s a massive club and Noni wants to be one of the best players in the world.”