Sumo's two grand champions, Hoshoryu and Onosato, happened to square off in Monday's training, less than a week before the start of the Nagoya Grand Sumo Tournament.Mongolian-born Hoshoryu won three times and lost once when the two yokozuna fought at the end of the session in sweltering heat.Neither wrestler knew the other's training schedule for the day until their arrival at the Sakaigawa stable's base in Fuso, Aichi Prefecture."It turned out to be a great session," Hoshoryu said. "I want him to do well because the first tournament as a yokozuna is hard."Onosato is set to make his yokozun…READ FULL ARTICLE