In the second round of the Grand Prix, Arona won, in controversial fashion, his fight against the Japanese fighter Kazushi Sakuraba via corner stoppage. Although Sakuraba put Arona on his back and seemed to put to work his signature jumping stomps, Arona soon overwhelmed him, landing a series of brutal knees to the head, as well as hard soccer kicks to the face. The Brazilian's toenail accidentally slashed open the skin over Sakuraba's left eye, which the Brazilian capitalized on squeezing the cut and digging his finger into it in order to force the stoppage. The Japanese tried to keep on, but Arona hit another flurry of knees to the head, and ended the fight landing soccer kick after soccer kick. He was declared the winner when Sakuraba's corner called a stop to the fight at the conclusion of the second round due to the amount of damage he had sustained.