Jiu-jitsu ace Davi Ramos was dialed in against Nick Hein, finishing the fight in the opening round.

The lightweight bout was part of the preliminary card of today’s UFC 224 event at Jeunesse Arena in Rio de Janeiro. It aired on FX following additional prelims on UFC Fight Pass and ahead of a main card on pay-per-view.

The two fighters felt each other out for a bit to open, with Ramos hitting the deck on the first real exchange of the contest but Hein laughing a bit as he declined to follow. Realizing the need to force his opponent to the floor, Ramos drove through with a double-leg that earned him top position. From there, Ramos showed incredible transition work, baiting with a kimura attempt and then stepping over to the back, where he began to look for a choke.

While Hein had his chin tucked, the squeeze was too firm, and he was forced to tap with 45 seconds left in the first round.

“I want to become a complete athlete, like I’ve always been in jiu-jitsu – a fighter who has all the tools,” Ramos said after the win. “This is my way of fighting and the style I want to bring to the UFC – a fighter who has his own style but who knows how to do everything. That’s what I’ve been doing, but of course my intention going in this fight was to get his back and finish him.

“Now it’s one step at a time. This is my second fight as a lightweight, but I do not see myself far away from the division’s ranked fighters. I will fight any of them. I have a lot to learn and evolve, but I am already doing this, and I see myself as the future lightweight champion.”

After dropping his UFC debut, Ramos (8-2 MMA, 2-1 UFC) now owns back-to-back submission wins. Hein (14-3-1 MMA, 4-2 UFC) sees a three-fight winning streak snapped.

Up-to-the-minute UFC 224 results include:

• Davi Ramos def. Nick Hein via submission (rear-naked choke) – Round 1, 4:15
• Elizeu Zaleski dos Santos def. Sean Strickland via TKO (kick, punches) – Round 1, 3:12
• Warlley Alves def. Sultan Aliev via TKO (doctor stoppage) – Round 2, 5:00
• Jack Hermansson def. Thales Leites via TKO (punches) – Round 3, 2:10
• Ramazan Emeev def. Alberto Mina via unanimous decision (30-27, 30-27, 30-27)
• Markus Perez def. James Bochnovic via submission (rear-naked choke) – Round 1, 4:28

For complete coverage of UFC 224, check out the UFC Events section of the site.

(MMAjunkie’s Fernanda Prates and Ken Hathaway contributed to this report on site in Rio.)