Ozeki Kotozakura and new komusubi Onosato head into the final weekend of the Summer Grand Sumo Tournament in a two-way tie for the lead after improving to 10-3 on Friday.Kotozakura defeated one of four joint overnight leaders, 10th-ranked maegashira Shonannoumi, while Onosato was too strong for former komusubi Ura on Day 13 at Ryogoku Kokugikan.The other overnight leader, 14th-ranked maegashira Oshoma, surrendered his place at the top with a loss to sekiwake Wakamotoharu.Ozeki Hoshoryu is among five wrestlers on the second rung of the leaderboard at 9-4 after manhandling No. 6 maegashira Mi…READ FULL ARTICLE