#3 Jairo Riedewald
The first signing in what was expected to be Frank De Boer's long reign in charge of Crystal Palace, Jairo Riedewald's purchase made a lot of sense for the Eagles on paper. They had to pay a sum of around £8m to claim one of Ajax's most valuable players. A versatile player, Riedewald could slot in at centre-back, left-back and defensive midfield and was touted as an ideal De Boer player who can play in the flexible style of play Palace was aiming to nail.
What followed afterwards was totally unforeseen. Riedewald was dropped from the side after the 3-0 opening day defeat to Huddersfield and has only started 2 games for Roy Hodgson after Frank De Boer's sacking, both in the Carabao Cup.
Riedewald has been replaced in the starting line up by Mamadou Sakho who was signed later into the summer window and the other spots have been nailed down by more experienced players too as Palace are in a mini-resurgence phase now. Eagles fans are sure disappointed at how this transfer has gone, and the management is clearly not in favour of giving Riedewald a go.
The talented youngster looks like he will be shipped off by Palace as early as possible before his heroics for Ajax and his undoubted potential is forgotten. A definite transfer flop.