Ozeki Onosato survived a challenging battle with sekiwake Daieisho to advance to a flawless 14-0 Saturday at the Summer Grand Sumo Tournament.A day after securing back-to-back championships and yokozuna promotion, the 24-year-old Onosato maintained his bid to go undefeated through a 15-day grand tournament for the first time in his career.He gave ground as explosive pusher-thruster Daieisho (9-5) opened with a strong charge, but slipped to the side as the sekiwake came in for the kill, before pushing him off the dohyo.Yokozuna Hoshoryu improved to 11-3 by forcing out ozeki Kotozakura (8-6) …READ FULL ARTICLE