Rio Ferdinand has suggested that one player has matured considerably since leaving Arsenal and barely ever makes a bad decision now. Mikel Arteta and Edu have got very little wrong in the transfer market over the last few years; even their controversial decisions have often been vindicated. But perhaps they may wonder if they made the right decision selling one player in 2023. Arsenal sold Granit Xhaka to Bayer Leverkusen in a deal worth just over £21 million after a turbulent time at the Emirates. It appeared to be a smart move with Xhaka linked with a move away for most of the previous few y…