The Brazilian forward has bagged four goals and two assists in 10 Premier League appearances this campaign.
The Gunners are keen to offer him a new contract over his excellent form and top European clubs likes Real Madrid are interested in the 21-year-old forward.
But club legend William Gallas is not convinced if the Brazilian is good enough for Real Madrid.
‘I think Arsenal have to get that deal with Martinelli signed as quickly as possible,’ Gallas told Genting Casino.
‘I’m sure he’s hearing so many things about him, like Real Madrid being interested. Sometimes the player can be confused.
‘At the moment I think he’s playing well and Arsenal have to close that deal as soon as possible so he feels better in his mind.
‘I don’t think he’s good enough for Real Madrid yet.
‘In football after two or three games, everyone is raving about that player, “he’s magnificent” or “he’s a top-class player” but no, calm down, let him have a great season to get to another level. He’s still young, he’s only 21.
‘But if he goes step-by-step, he can go to a club like Real Madrid but right now he’s not ready.’
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