Yokozuna Hakuho, and ozeki Terunofuji, who is aiming for promotion to that same exalted rank, each won on Friday to remain undefeated co-leaders after six days at the Nagoya Grand Sumo Tournament.Hakuho, who is coming off right knee surgery in March, beat No. 3 maegashira Hokutofuji (3-3). The 36-year-old yokozuna has won a record 44 grand tournaments, but has missed all or part of the previous six meets, and needs a solid record over 15 days at Dolphins Arena to stave off retirement.Facing a wrestler who relies heavily on thrusting and shoving, Hakuho rocked Hokutofuji back on the charge b…READ FULL ARTICLE