1. During the dispute and fight with the coach, Xiang Tenghui may have been attacked or accidentally injured by the coach, resulting in leg injury.
2. Another possibility is that Xiang Tenghui fell down or hit the cage or the surrounding objects for some reason, resulting in leg injuries.
The specific circumstances may vary from time to time, and may also vary according to the rules and specific circumstances of the competition. It is suggested that you consult the official reports of related competitions, or seek the help of octagonal cage competition professionals to obtain more accurate information.