“He felt something during half-time,” Ruben told Sky Sports. “He was eager to continue playing, which is a positive sign.
“However, we can’t risk losing more players if they’re not fully fit.
“Jack performed exceptionally well.”
Casemiro made his return from suspension, but Bruno Fernandes and Kobbie Mainoo are sidelined due to injuries, along with defenders Harry Maguire and Matthijs de Ligt.
Noussair Mazraoui, who played in Morocco’s 1-1 draw against Mali on Friday, is currently competing in the Africa Cup of Nations, along with Amad and Bryan Mbeumo.
