خوان الأول ملك قشتالة
The effects of the Portuguese defeat also felt in the following year, when the Kingdom of Portugal had to face, militarily weaker than usual, a vigorous attack by sea and land from the Crown of Castile. The Castilians came to the gates of Lisbon, forcing the King of Portugal to sign peace in August with John I of Castile, by the Treaty of Elvas.