The former Gunners’ striker has also pointed out valuable a lesson they can learn from City.
Thierry Henry has urged Arsenal to get rid of emotions if they want to stand a chance of beating Manchester City in the Premier League.
Arsenal have dropped points in their last two games – following 2-2 draws against Liverpool and West Ham United – to see the gap reduced from eight points to just four.
While admitting he is not assured of Arsenal's game management, Henry says the Gunners cannot win the league if they are controlled by emotions.
"I don’t know the last time we beat Manchester City so it’s going to be a tough one. The last game against them [a 3-1 defeat in February] didn’t reassure me," Henry said on CBS Sports.
"Since the start of the season I’ve been talking about emotions and how you don’t win league titles with emotion. I’m sorry, but you don’t.
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The Frenchman – with seven games to go - says the title is still effectively in the Gunners’ hands.
"You can win a cup with emotions, but not a 38-game season. You can’t be too emotional, and we’ve seen recently that Arsenal have been too emotional.
"There is a difference between passion and emotion. You can feel emotions but don’t become too emotional, that’s the difference. They need to stay calm."
The 2003-04 Invincible has called on his former side to learn from City, whom he says are never emotional no matter what the scoreline reads.
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"We are still ahead of Man City but they need to get rid of the emotional part of the game and concentrate on their job because we were not expected to be there," he added.
"They may be a bit hurt mentally but we are still ahead. Man City still need to win their games and beat us. So, it’s still there in front of you, but for me we need to get rid of the emotional side of the game.
"When you watch Man City, they look composed whatever the score is. I know we are talking about the crème da le crème but this is what Arsenal need to be.
"Sometimes when I watch Arsenal, the game is so up and down and they lose control. But again, we’re still ahead."
Arsenal will play struggling Southampton on Friday, giving them a chance to get back to winning games. Thereafter, they will face City in a game tipped to be the title decider.