The preparations were also delayed by a naval battle that took place when the Castilians found out that one or two Portuguese ships with a rich cargo had left the Mediterranean to return to Portugal under the escort of the pirate Alvar Méndez.
Os preparativos tamén foron atrasados por unha batalla naval que se produciu cando os casteláns souberon que un ou dous barcos portugueses cun rico cargamento acababan de saír do Mediterráneo rumbo a Portugal e estaban esperando ao pirata Alvar Méndez, que viña escoltalos.