The teenager has further extended his stay with the Gunners, putting pen to paper for a contract extension.
The 19-year-old Brazilian forward put pen to paper on his new deal exactly one year after he joined the club.
Martinelli joined the club on a four-year deal last summer and has now re-signed a new four-year deal.
The youngster will now remain at the club until 2024 with an option to extend for a further year.
Martinelli has impressed since making his debut against Newcastle last August and is well deserved of his new contract.
Mikel Arteta told the club’s official website: “I am very happy that Gabi has signed a new contract with us.
“He is a very talented young player and he has impressed us with his performances, attitude and work-rate.
“We are looking forward to getting him back to full fitness and to watching his development at our club.”
The Brazilian was also delighted to sign a contract and reacted to it all by sharing a message on social media.
“I am very happy to commit my future to this great club and I would like to thank Arsenal and all the fans for this fantastic year. It is the first of many and I can’t wait to be back to play a part in the exciting seasons to come,” Martinelli posted on Instagram.
“Play for the name on the front of the shirt and they’ll remember the name on the back,” his message finished, tagging Arsenal legend Tony Adams.
It is a step in the right direction for Arsenal as it means they have now secured youngsters Martinelli and Bukayo Saka for the long-term.
Since making his debut for the club last August, the 19-year-old has scored 10 goals and supplied four assists in 26 appearances. He is the first teenager to hit double figures in goals for Arsenal since Nicolas Anelka 20 years ago.
