However, according to the judicial interpretation of personal injury compensation, the "General Principles of Civil Law" and the "Contract Law", if it can be proved that you sneaked in to play without buying a ticket, no contractual relationship was established between the two parties, and the arena There is no safety guarantee obligation in the Contract Law.
So from what you said, there is no basis for ordering the arena to take responsibility. (Unless the opponent is a minor and has major faults in the management of the arena)
Zongheng Legal Network Lawyer Xu Yong