City of the Seventh Moon by Antano Sparreboom

When he is chosen as champion of the noble Urwilar family, Verhan knows well that his main job is to fight other champions to settle political disputes. What he doesn’t count on are the machinations of the beautiful Lady Morani, and his pride is mercilessly turned against him. As he fights to survive the dangers of the capital, the influential Three Cities Council plans to assassinate the emperor’s chief advisor and take control of the entire imperial court.