Tennis no Oujisama Movie 2: Eikokushiki Teikyuu Shiro Kessen!

Synopsis

Seishun Academy and rivals are invited to a junior tournament at Wimbledon. Before the event, some players are attacked by a gang. The assailants wear silver rings and are led by Keith. Ling Xiu, a former member of the banned violent tennis group Clack, warns the students about the gang's dangerous playstyle. Ryouma, seeking to stop the attacks and help Xiu, confronts Keith and Clack.