Yokozuna Hoshoryu wrapped up the opening week of the Autumn Grand Sumo Tournament with a perfect 7-0 record and the outright lead after handling No. 4 maegashira Hiradoumi on Saturday.The Mongolian-born grand champion maintained his one-win buffer over fellow yokozuna Onosato and three other wrestlers at 6-1, but ozeki Kotozakura (5-2) dropped from the second rung of the leaderboard with an upset loss on Day 7 of the 15-day tournament at Tokyo's Ryogoku Kokugikan arena.Having lost just once to Hiradoumi (4-3) in their eight previous top-division meetings, Hoshoryu looked momentarily to be i…READ FULL ARTICLE