Ten players Arsenal will regret not signing this summer, including Chelsea duo & Man United new-boy

6) Sokratis Papastathopoulos (Borussia Dortmund)

Another defender who was supposedly available, Sokratis Papastathopoulos was strongly linked with Arsenal in the final week of the transfer window, and looks like being just what the team needed at the back. The 26-year-old was in fine form for Borussia Dortmund last season and was said to be allowed to leave for just £16m – surely a price Arsenal can afford to give them some depth in a problem position.