No. 8 maegashira Endo blew the title race wide open by emphatically flooring runaway leader ozeki Terunofuji on Saturday, the penultimate day of the Summer Grand Sumo Tournament, with ozeki Takakeisho also staying in the mix.

Terunofuji (12-2) held a two-win lead over his two closest rivals entering the penultimate day of the 15-day event at Ryogoku Kokugikan but Endo and Takakeisho have now moved within a win on 11-3, meaning Terunofuji's defeat on Sunday could result in two- or three-way playoff.

Endo (L) upsets ozeki Terunofuji on the 14th day of the Summer Grand Sumo Tournament at Ryogoku Kokugikan in Tokyo on May 22, 2021. (Kyodo) ==Kyodo

Endo was at his bullish best as he barged into Terunofuji's bigger frame, getting his head against the ozeki's chest and forcing Terunofuji to resort to his forceful swing with his powerful left arm.

But an unperturbed Endo grabbed an underarm belt hold with his right and wrapped a leg around Terunofuji's leg in executing a throw. Terunofuji desperately held on to throw his opponent as both wrestlers teetered over the straw.

Although originally ruled the winner, an unusually long judges' review decided Terunofuji right elbow touched down first, leaving Endo unable to disguise a smile.

Takakeisho, whose loss to Endo on Friday shaped the current three-way race, followed them into the ring in the day's finale. He overcame Shodai (8-6) with a timely thrust down against the fellow ozeki near the edge enough to keep pace with Endo.

Sekiwake Takayasu reached 10 wins for the second straight tournament, the former ozeki proving too powerful as he charged and slapped down No. 5 Hoshoryu (6-8) -- the nephew of Mongolian former yokozuna Asashoryu.

Sekiwake Takanosho's indifferent form continued as he was unable to work his way around giant No. 6 Ichinojo (9-5), falling to a slap down near the edge and suffering his 10th defeat.

Takakeisho (L) defeats fellow ozeki Shodai on the 14th day of the Summer Grand Sumo Tournament at Ryogoku Kokugikan in Tokyo on May 22, 2021. (Kyodo) ==Kyodo

New Year meet champion komusubi Daieisho (5-9) failed to force his way against No. 5 Onosho (7-7), who then won by force-out.

Komusubi Mitakeumi (9-5) forced out Takarafuji (6-8).

Terunofuji, a 29-year-old Mongolian, is fighting as an ozeki for the first time since September 2017, with knee injuries forcing him down to the sport's second-lowest division in March 2019.

He returned to the top-tier makuuchi division last July -- when he remarkably won his second career grand tournament -- and won his third in March to seal his epic comeback with re-promotion to ozeki.

Responding to government guidance due to a coronavirus state of emergency in Tokyo, the Japan Sumo Association started the ongoing tournament in silence but it has been allowed to admit up to 5,000 fans from the fourth day.

This composite photo shows Endo (R) defeating ozeki Terunofuji in a close fight on the 14th day of the 15-day Summer Grand Sumo Tournament at Ryogoku Kokugikan in Tokyo on May 22, 2021. (Kyodo) ==Kyodo