Ioannes II might have taken Neokaisareia, but for the unexpected pride and unjust anger of his nephew Ioannes, son of his brother Isaakios. When a fierce battle had begun, Ioannes II saw that a distinguished Italian knight had no horse, and told his nephew to provide him with his Arabian steed, knowing he had others. The young man was furious and abusive, challenged the Italian to a duel for the horse, but eventually had to give way, seeing the emperor was angry. He remounted on another horse, charged towards the enemy, but suddenly stopped, reversed his lance, removed his helmet and deserted. He was welcomed as an old acquaintance, and one who would help the Turks. He would later become a Muslim and marry the daughter of Mas'ud of Ikonion