One of the best men of Castille.
Now there was at this time war between Almocanis, King of Seville, and Almundafar, King of Granada, and with Almundafar were these men of Castille, the Count Don Garcia Ordonez, and Fortun Sanchez, the son-in-law of King Don Garcia of Navarre, and Lope Sanchez his brother, and Diego Perez, one of the best men of Castille; and they aided him all that they could, and went against the King of Seville, and when my Cid knew this it troubled him, and he sent unto them requiring them not to go against the King of Seville, nor to destroy his country, because he was King Don Alfonso's vassal; otherwise the King must defend him.
And Count Garcia Ordonez was taken prisoner, and Lope Sanchez, and Diego Perez, and many other knights, and of other men so many that they were out of number; and the dead were so many that no man could count them; and the spoils of the field were very great.