The close of the Premier League window on August 30th does not mean Manchester United’s summer business is done and dusted. Turkish Super Lig clubs are free to sign players until September 13th. And, a year after Manchester United terminated Eric Bailly’s contract and allowed the defender to head out to Besiktas, Casemiro’s increasingly-catastrophic Red Devils career could be brought to a timely end by another Istanbul-based giant. According to reporter Turkish Ali Naci Kucuk, writing on X, Super Lig champions Galatasaray opened talks with the veteran Brazilian after his disastrous performance…