Why on earth did Arsenal sell Szczęsny?

That a club with the stature, expectations and standards of Juventus were willing to replace their greatest ever goalkeeper with Wojciech Szczęsny should have been the subtlest of clues to Arsenal that they shouldn’t sell. When their options were a visibly declining Cech and a too-short-to-ever-be-good-enough Ospina, and one of Europe’s leading clubs wanted their man, Arsenal perhaps should have realized what they had. Instead, the Pole was sold to Turin for a pitiful 12m Euros.