Martinelli joined Arsenal from Ituano last summer and has really impressed whenever brought on by Unai Emery.
Holding has recovered from injury and gotten a chance to face off against the young Brazilian in training. He reacted, “He’s [Martinelli] come in and settled really well.
“In training every day, he works hard. He puts you under pressure constantly and never stops running, which as a centre half is a nightmare. You want a striker that will sort of give up on you, but he never gives up.
“His finishing has been unbelievable, even with his head. He’s only a small guy but the headed goals he’s scored in the Forest game and the Standard Liege game have been incredible goals, to be fair to him.”
Holding added: “I think he’s really close with Emi [Emiliano] Martinez. He spends a lot of time with him and I think he’s translating for him as he picks up English.
“In yoga, he is trying to learn as much English as he can. It’s only a small group of five or six of us, so he’s learning English as he goes along and he’s making an effort, which is important.”
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