People talk in here like he pull up a Karius or something. It was a tricky shot, and he missed up.It happened to Gigi, to Woj, to De Gea, to Lloris and a lot of quality gks.
having said that, I really see no point in buying him in the first place, we need a Storari/Manninger type of GK. Someone old with experiece that you can count on, Perin would do good as 1st choice Gk in any Serie A Side (Barring Milan and Inter), and a lot of PL/La liga sides. No idea why he wants to warm the bench for Woj.