As David de Gea saved not one but two penalties during Fiorentina’s victory over AC Milan, Manchester United boss Erik ten Hag must have wondered what he had done to offend the footballing gods. It feels almost like every decision the embattled Dutchman makes these days becomes the subject of mockery and almost cosmic levels of misfortune. David de Gea famously failed to save a single one of Villarreal’s 11 spot-kicks during that Europa League final defeat back in 2020. In fact, throughout his long Manchester United career, De Gea kept out only seven of the 50 spot-kicks he faced outside of pe…