Martinelli's position is in doubt after the arrivals of Noni Madueke and Ebere Eze from Chelsea and Crystal Palace respectively.
But the Brazil attacker says: "Regarding Arsenal, it’s like here in the national team.
"If you ask me if it’s good to have Vini or Rodrygo in the national team, I’ll definitely say yes.
"Because he’ll help the team to win titles. And if we want to win, we need quality players.
"It’s the same with Arsenal. I’m very happy with Eze and Madueke’s arrival as well. Trossard also plays on the left side.
"So, we’re very happy when we have quality players by our side. We have a lot of matches in the season. A lot of things can happen, injuries, etc.
"So, we’re happy for the club to be looking for the best players in the league so we can try to win."