One is a lonely number, so the Warren County High School boys tennis team decided to double their championship total.The Pioneers clinched their second-straight District 6-AAA championship Thursday by defeating the Cumberland County Jets 11-0 at McMinnville Civic Center.Warren County, now 10-0, had its sights set on state competition from the start of the year, but still had to take care of business against district teams.The Pioneers barely had to break a sweat against the Jets. Warren County’s talented team continued to shine, getting contributions from top to bottom to sweep Cumberland County.Shunsuke Nakashima and Seth Grissom kept their undefeated singles seasons intact early, while Nakashima and Thomas Locke continued their torrid pace as a doubles pairing.Nakashima defeated Lee Presson, one of the top singles players in the district, 8-5 to earn his ninth straight singles victory. Grissom followed suit with an 8-3 win over Jared Roberts.Nakashima and Locke were at their best in doubles as they took down Presson and Daniel Koehl 8-4.