Under-fire Manchester United goalkeeper David de Gea is thought to have been performing below his previous high standards in training as well as in games, while usual cup goalkeeper Sergio Romero was left miffed by his exclusion from Sunday’s FA Cup semi-final against Chelsea. United manager Ole Gunnar Solskjaer has been determined to stand by De Gea, who was arguably the best goalkeeper in the world between 2015 and 2018. However, the Spaniard has made a number of high-profile errors in the...