I think it's like about ryoma and the seigaku members going to America または winbulton または something like that. And seigaku, hyotei, shitenhouji, rikkaidai fuzoku, and higachu is there to compete against these other テニス players in a tournament I think.
The movie's タイトル is The Prince of Tennis: Eikoku-shiki Teikyū-jō Kessen!....It's about Seigaku and a familiar selection of Japan's other 上, ページのトップへ junior テニス teams gather in Wimbledon, London, for a テニス tournament. During テニス practice, the Japanese players are suddenly attacked によって a violent "street tennis" group that calls themselves "Clack". An encounter with a former Clack member named Xiu leads Ryoma and his フレンズ into a battle with Clack to confront its leader, Keith, and discover his reasons for having such a violent approach to tennis.