UFC 331: Tsarukyan Faces Ruffy's 93% Knockout Problem

Los Angeles, Crypto.com Arena. As Arman Tsarukyan stepped into the octagon, his eyes were not fixed on Mauricio Ruffy dancing in the opposite corner, but on the canvas below, as if checking his own legs. For ordinary fans, it was just a habit. But for those who followed the Armenian fighter's journey since his last-minute withdrawal from UFC 311 due to a back injury, the image carried deeper meaning. An unhealthy back is every wrestler's nightmare. And tonight, facing a knockout specialist like Ruffy, Tsarukyan's back would be tested in the most brutal way. The UFC 331 co-main event pits Tsarukyan, ranked No. 2 at lightweight and No. 16 pound-for-pound, against Ruffy, ranked No. 10 and riding high after a first-round knockout of Michael Chandler. The fight is scheduled for five rounds, a rarity for a non-main event, signaling that the UFC treats it as a true championship contest. The winner will almost certainly face Justin Gaethje, the name mentioned as the title target. Bookmakers set Tsarukyan at -275 and Ruffy at +225, implying roughly a 70% win probability for the Armenian. But odds only tell part of the story. This is a classic grappler-versus-striker matchup. Tsarukyan brings freestyle wrestling and relentless chain wrestling that has beaten many top opponents, riding a five-fight win streak into tonight. Ruffy, by contrast, is a Brazilian striking specialist with 13 of 14 wins by KO/TKO, a 93% knockout rate that is freakish at lightweight. The decisive question: can Ruffy stay upright under Tsarukyan's wrestling pressure? No one has provided his takedown-defense numbers. That is the biggest unknown. If Ruffy cannot stop the takedowns, his knockout weapon is neutralized and the fight enters Tsarukyan's control-time territory. If he stays standing, one clean shot, one right hand, is enough to reshape the entire lightweight division. Tsarukyan's reputation is not built on raw power but on chain wrestling, constantly transitioning from one takedown to another when the first is stuffed. He does not need a highlight-reel slam; he only needs to make opponents exhausted from defending. As the fight deepens, their gas tank drains and the technical gap widens. That strategy has beaten elite strikers before, and on paper Ruffy fits the same formula. But Ruffy is not a fighter who knows fear. He comes from the Brazilian striking school with Muay Thai and freestyle foundations. He does not move much; he plants his feet, pressures forward, and waits for the moment of carelessness. His right hand is so heavy that Chandler, a seasoned brawler, could not get up after one round. What makes Ruffy truly dangerous is his absolute confidence. He enters the cage with the mindset of a hunter, not a survivor. That mentality makes him a threat to any wrestler, because one small mistake while shooting for a takedown is all his punch needs. Yet there is a variable the oddsboard cannot show: Tsarukyan's back. Earlier this year, he was forced to withdraw one day before the UFC 311 title fight against Makhachev due to a spinal injury. For a fighter who relies on low stances, explosive level changes, and mat returns, a back injury is like a ticking time bomb. Tsarukyan returned impressively and submitted Hooker, but no one knows how he feels over five rounds. The five-round format theoretically favors Tsarukyan: wrestling compounds late, while knockout hunters usually have an early-round window. But if his back will not allow sustained wrestling intensity, that advantage becomes a liability. On résumé, Tsarukyan is clearly superior: 23-3, having fought Makhachev, and ranked level with Topuria at No. 2. Ruffy is 14-2, with his biggest win over Chandler, a big name but one in decline. On paper, class leans heavily toward Tsarukyan. Rankings and odds both say so. But lightweight is the most unforgiving division in the UFC, where one punch erases technical distance. Ruffy did not come to Los Angeles to serve as a backdrop for a coronation. He carries the one weapon bookmakers cannot price: fight-ending power in an instant. Conventional thinking says Tsarukyan will take Ruffy down and slowly smother him in boring but effective fashion. That thinking ignores two details. First, UFC history is full of heavy favorites collapsing because of hidden injuries: a wrestler who loses his ability to drop his level because of back pain becomes a stationary target. Second, Ruffy's 93% knockout rate is not luck; it reflects elite distance reading and timing. He does not need many chances, only one. As long as the fight is standing, Ruffy is a lethal threat. Gamblers look at the numbers and see Tsarukyan as safe. But MMA has a rule: no odds are safe when your opponent has a punch that can turn out the lights. Notably, every pre-fight analysis revolves around Ruffy's takedown defense, yet no number is given. That silence is itself a message. If Ruffy had solid takedown-defense stats, his team would showcase them as a strength. The absence suggests a known weakness, and Ruffy's only path is to make Tsarukyan afraid to shoot, by applying fierce striking pressure from round one. It is a risky strategy, but for a fighter with a 93% KO rate, risk is instinct. The lightweight division is in a turbulent transition. Makhachev, the man Tsarukyan was supposed to face at UFC 311, holds the dominant position. Gaethje is named as the next target for tonight's winner. Topuria, ranked level with Tsarukyan at No. 2, is also waiting. In that picture, this co-main is like a knockout bracket: the winner steps forward, the loser goes back to the queue. Pressure comes not only from the opponent in front but from the line behind. Psychologically, Tsarukyan carries the weight of a fighter who lost a title opportunity at the last minute. The sardonic phrase, nothing could go wrong, right, is really a reminder that careers can turn at any moment. Referee Jason Herzog, one of the UFC's most experienced officials, will ensure the fight is controlled by the rules. But rules cannot protect a fighter from his own fears. A five-round fight only amplifies the possibility of extreme tension. For Vietnamese fans, MMA is still a young sport but UFC viewership is growing fast through streaming platforms. The Tsarukyan-Ruffy matchup is exactly the kind of contest that excites newcomers: methodical wrestling against pure knockout power. Anyone new to MMA will learn two big lessons from this fight. First, wrestling can neutralize everything. Second, one punch can erase all plans. This fight is not just about who challenges Gaethje; it decides whether Tsarukyan escapes his own shadow after the UFC 311 disaster. If he wins, the comeback story is perfect. If he loses, his back and those haunting bell sounds will follow him for the rest of his career. As for Ruffy, he needs only one night. One night to turn himself from underdog into the fighter who reshapes a division. At lightweight, the line between glory and collapse is never wider than one punch.