Tennis no Ōjisama – Futari no Samurai (2005)
Tennis no Ōjisama Futari no Samurai The First Game is an animated film based on the manga series The Prince of Tennis by Takeshi Konomi. It was produced by Nihon Ad Systems and Production I.G., and directed by Takayuki Hamana. The movie premiere aired after another short film spun off from the series titled Tennis no Oujisama Atobe Kara no Okurimono.
More at Wikipedia.