Kotooshu took a significant step toward becoming the first ever European grappler to win the Emperor's Cup when he pulled off a stunning win over Mongolian yokozuna Asashoryu at the Summer Grand Sumo Tournament on Wednesday.

The Bulgarian pinup improved to 11-0 to stay one win ahead of Hakuho, who beat ozeki Chiyotaikai, while Asashoryu dropped into a tie at 9-2 with rank-and filer Toyonoshima.

Kotooshu entered the 15-day meet facing relegation but has been in scintillating form at the 15-day meet, posting his most impressive winning streak since going 12-0 as a sekiwake at the 2005 autumn basho.