Arsenal manager Mikel Arteta was delighted after Bukayo Saka committed his long-term future to the club.
Sources say the deal will keep Saka at the club for another four years after protracted negotiations over an extension.
The 18-year-old has broken through the academy and impressed in the first-team this season, and Arteta says he will be demanding more now from the Londoner.
Asked about the deal, the Spaniard said: "Well, I think he is the player that represents every value that this football club stands for.
'He's come through the academy, so big credit to everyone who has been involved in the process of developing the player and the person that he is today.
"He's come into my hands, our hands, really mature, really focused and really well developed in his knowledge about what he needs to do in the game, and it was really important for me to keep him and have big belief in him.
"From now on, I will be demanding more because he can give us more and more hopefully in the future."
