Alexandre Pantoja (20-3 MMA, 4-1 UFC) turned in perhaps the best performance of his UFC career, submitting Ulka Sasaki (21-6-2 MMA, 4-5 UFC) with relative ease.

The flyweight contest took place on the FS1-broadcast prelims of Saturday’s UFC Fight Night 140 event at Parque Roca Arena in Buenos Aires, Argentina.

The two men engaged immediately with strikes at the start, and Sasaki wagged his tongue after the initial flurry. Pantoja shot inside, and while Sasaki defended it well, he still found himself in trouble. Working from his back, Pantoja first attacked the arm and then moved in for a triangle choke, though Sasaki was able to battle through the attacks. Pantoja teased a leglock, forcing Sasaki to spin, ultimately giving up his back in a beautiful transition. Pantoja immediately wrapped the neck with the right arm, and while Sasaki tries to keep his chin tucked, the squeeze was tight and eventually slipped down into place. Sasaki gargled a bit as he tried to battle the hold but was forced to tap at the 2:18 mark of the first frame.

After the win, Pantoja called for a future booking with fellow flyweight contender Jospeh Benavidez.

Up-to-the-minute UFC Fight night 140 results include:

• Alexandre Pantoja def. Ulka Sasaki via submission (rear-naked choke) – Round 1, 2:18
• Austin Arnett def. Humberto Bandenay via unanimous decision (29-28, 29-27, 29-27)
• Laureano Staropoli def. Hector Aldana via unanimous decision (30-27, 30-27, 30-27)
• Jesus Pinedo def. Devin Powell via unanimous decision (29-28, 30-27, 30-27)
• Nad Narimani def. Anderson dos Santos via unanimous decision (30-27, 30-27, 30-27)

For complete coverage of UFC Fight Night 140, check out the UFC Events section of the site.