Mikel Arteta, the manager, wants to bolster his team after a season in which Arsenal challenged for the title.
Arsenal has been connected with a number of players, and he is eager to sign a right-back.
Castagne is the second-most wanted man after Ivan Fresneda, according to Belgian journalist Sacha Tavolieri, and they are currently moving for him.
Leicester and Arsenal have begun speaking, and it’s possible that things will move swiftly.
The Gunners want to learn what conditions Leicester will want in order to release the Belgian.
Following their relegation to the Championship, Leicester will likely have a large amount of roster turnover this summer.
And by moving to Arsenal in the upcoming weeks, Castagne might avoid competing in the second division and secure a spot in the Champions League.
The King Power Stadium has a deal with the 27-year-old player that is valid through the summer of 2025.