Ukrainian ozeki Aonishiki expressed relief Monday after capturing back-to-back championships at a "tense" New Year Grand Sumo Tournament.The 21-year-old prodigy continued to dazzle the sumo world over the 15 days of competition at Tokyo's Ryogoku Kokugikan arena, culminating in his championship playoff victory Sunday over rank-and-file opponent Atamifuji.The two wrestlers finished in a tie for the lead with 12 wins and three losses, setting the stage for the decisive bout that the newly promoted ozeki won by throwing his much larger opponent."I finally feel like I can relax," Aonishiki, who…READ FULL ARTICLE