Sumo's lone grand champion Terunofuji has undergone endoscopic surgery on both knees, his stablemaster Isegahama revealed Saturday.
The Mongolian-born yokozuna, a seven-time tournament winner in the top division, has already left hospital following Tuesday's surgery.
Asked whether Terunofuji could wrestle at the Kyushu Grand Sumo Tournament beginning Nov. 13 in Fukuoka, Isegahama said, "He had the surgery only recently, so we just have to wait until his knees are healed."
Injuries to both knees forced the 30-year-old to pull out during the second week of the Autumn Grand Sumo Tournament in Tokyo last month.