OSAKA, Mar. 13. - One of the three clean slate record holders - Sekiwake, Matsunobori, 5 ft. 7, 320 lbs. - finally hit the dirt on the eighth day of the Grand Spring Professional Sumo Tourney at the Osaka Prefectural Gym, Namba, Sunday.
    The full-house crowd cheered thunderously as fighter Wakanohana who holds a record of seven wins and one tie pulled pot-bellied Matsunobori out of the ring after a hotly contested battle.
    Two other undefeated wrestlers - Grand Champion Chiyonoyama and Ouchiyama - downed Tamanoumi and Miyanishiki, respectively, to maintain their winning streaks.
    In an all giant affair, 328-pound Ozeki, Mitsuneyama went down in defeat before 390-pounder Odachi.

    OSAKA, Mar. 13. - The 15-day Grand Summer Professional Sumo Tournament will open on May 15 at the Kuramae Kokugikan Arena, the Japan Sumo Association announced Sunday.
    The new rankings for the summer tourney will be announced on May 7.