Arsenal has confirmed the signing of former Gunner Mathieu Flamini on Thursday, according to various sources.

Flamini spent five seasons with AC Milan after leaving London in 2008. His stint with the Rossoneri was injury-plagued.

While his preferred position is at the center of the pitch, he has shown flashes of brilliance when employed as a left back or right back.

A Gunner at heart, the Frenchman is excited to take part in the proceedings and contribute to the team.

"It feels good to be back home," Flamini told arsenal.com.

"I have some unfinished business with Arsenal so it's a great feeling to be back. Once you're a Gunner, you're always a Gunner."

"Unfinished business because we had the opportunity a few times when I was there to win trophies and we didn't. I'm thinking about the Champions League final, the 2007/08 season when we were in the running for the first place and we didn't close it."

"I feel good, I have been training for three weeks with the fitness coach, Tony Colbert. So I feel ready to start competing for Arsenal, especially on Sunday - it's going to be a big game."

"It's a derby, everyone knows how important it is. We have to win it and we have to be ready for it."

Meanwhile, Gunners boss Arsene Wenger was delighted to have swayed the battle-tested Flamini to don the red uniform anew, highlighting his versatility.

"We're very pleased Mathieu has agreed to re-join us," Wenger said.

"He is a player of real quality, with a fantastic work rate and great mentality. As we know, Mathieu is a strong midfielder, but is also is comfortable playing in defence too. He is a very good addition to our squad."

The Frenchman will be sporting the number 20 on his shirt, a new number which may signify a re-birth of his ailing career.

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