LAS VEGAS – Decorated grappling world champion Rodolfo Vieira had a feeling he was going to win by submission in his return to the octagon. Vieira (10-2 MMA, 5-2 UFC) got his hand raised Saturday on the main card of UFC Fight Night 236 at the UFC Apex in Las Vegas after he submitted Armen Petrosyan (8-3 MMA, 3-2 UFC) with an arm-triangle choke in the first round of their middleweight contest – something he saw coming. “I’m feeling great with this victory, with one more finish,” Vieira told reporters at the UFC Fight Night 236 post-fight press conference. “I knew that he was a high-level striker, but he had a lot of (holes) in his ground game. I knew if I put him down, I would finish him.” Not much surprised Vieira when it came down to face Petrosyan. However, the calf kicks Petrosyan threw did throw a small wrench into the fight