A new Prince of Tennis OVA, called Prince of Tennis OVA Another Story ~Kako to Mirai no Message~, was announced at Shueisha's Jump Festa 09 this past weekend. The official website of the show has confirmed it yesterday. According to the latest issue of Weekly Shonen Jump magazine, Another Story will take place in Osaka after the finals. The preview of the new OVA will be available on the third volume of Prince of Tennis: The National Tournament Finals.
Prince of Tennis: Another Story - Messages From Past and Future Comments