Grand champions Hakuho and Kakuryu will both miss the Autumn Grand Sumo Tournament starting this weekend after deciding to pull out Friday due to injury concerns.The 15-day tournament, which opens Sunday at Tokyo's Ryogoku Kokugikan, will be the first in 37 years to commence without any wrestlers occupying the sport's highest rank.Both Mongolian-born yokozuna withdrew from the previous grand tournament in July. An injured knee forced Hakuho out with three days remaining, while Kakuryu forfeited his second-day bout with an elbow injury and did not return.With the two 35-year-old grand champi…READ FULL ARTICLE