Before the departure, Zhang Heng received some information provided by Mark Reuss. Among them, the opponent he needed to pay attention to was a man named Sartonilos.
The latter was a gladiator of the same age as Sethnets. When he began gaining fame, Sethnets happened to be at the peak of his career. Hence, Sartonilos's name was entirely overshadowed by Sethnets. Displeased by such injustice, he decided to challenge Sethnets.
However, the two belonged to different gladiator schools. In other words, they could not meet up to fight with each other. If Sartonilos wanted to challenge Sethnets, both gladiator schools needed to agree.