Players and coaching staff of Benfica have fallen ill before the match against Porto

Many Benfica footballers, as well as members of the coaching staff led by José Mourinho, have shown signs of a viral infection, reports A Bola.

José Mourinho, Getty Images

According to the source, the main symptoms are headaches and muscle pain. This situation is causing serious concern for the club management ahead of the match of the 8th round of the Portuguese championship against Porto. The Portuguese «El Clásico» will take place on Sunday at Dragão.