Just as one star prepares for his comeback, another has been ruled out—again—with a serious injury that further complicates manager Xabi Alonso’s plans. Real Madrid’s march through the Club World Cup group stage has been nearly flawless,

When the Frenchman arrived at Real Madrid last summer, he settled for the No. 9 shirt, left vacant since the departure of his compatriot Karim Benzema. Mbappé went on to score 43 goals in his debut season at the biggest club in the world, winning the Pichichi Trophy and the European Golden Boot.

Kylian Mbappe was released from the hospital Thursday after being treated for an acute case of gastroenteritis. He trained at the club's hotel Friday.