Juventus are reportedly signing in signing one of Arsenal’s star players, with the north London side open to a sale this summer. The upcoming transfer window is setting up to be one of the most important for Mikel Arteta’s side in some time, with a number of sales expected to be made as Arsenal ready themselves to upgrade the squad yet again. The likes of Eddie Nketiah and Reiss Nelson have been linked with moves away whilst a number of academy players such as Mika Biereth are also reportedly set to depart, with Arsenal expected to recoup quite a bit of money in the summer. And one of Arsenal’…