OVA series: The Nationals Arc Doubles 1 turns into a singles match when Tezuka and Chitose decide to duke it out. Inui and Zaizen step aside for their respective captains (Tezuka and Chitose). After Chitose takes the first game with his "Saiki Kanpatsu no Kiwami," Tezuka decides to show Chitose his true power, revealing that he has opened the 2nd door of Muga No Kyōchi. In the end, Tezuka wins with a victory of 6-1. Meanwhile Rikkaidai has a few problems with their opponent Nagoya, and Akaya Kirihara, drenched in blood, has been hit all the way back to fence, making a huge dent... (thetvdb.com)