Updated August 19, 2026
The heavyweight matchup between No. 9-ranked Serghei Spivac and No. 11-ranked Vitor Petrino brings together two fighters with very different paths to victory at UFC Fight Night in Sacramento on Saturday, August 22. Spivac enters at 18-6 after beating Ante Delija by unanimous decision in February, while Petrino has won 3 straight since moving to heavyweight, most recently taking a unanimous decision over Steven Asplund in March. The market has Petrino as a modest favorite, as he looks for a 4th straight win, one that would take him into the top 10 in the division.
Statistic | Serghei Spivac | Vitor Petrino |
|---|---|---|
Age | 31 | 28 |
Height | 6'3" | 6'2" |
Reach | 78" | 77.5" |
Stance | Orthodox | Orthodox |
Record | 18-6 | 14-2 |
Spivac's clearest route is to force Petrino into extended wrestling exchanges, get him against the fence, and spend enough time on top to take away the Brazilian's biggest weapons. Spivac averages 3.82 takedowns per 15 minutes and has landed 32 of 54 career UFC attempts, giving him a 59% takedown accuracy rate. Petrino, however, has stopped 21 of 26 UFC takedown attempts, an 81% defense rate.
That defensive number is the key reason our model gives Petrino a slight advantage. Spivac has historically been at his best when he can establish his wrestling early, but Petrino's takedown defense creates a significant obstacle. If Spivac cannot consistently put him on the mat, he is likely to spend longer stretches in striking exchanges where Petrino owns the upper hand.
Petrino has landed 3.2 significant strikes per minute, while absorbing under 3.0 strikes per minute from his opponents. Spivac lands 3.57 significant strikes per minute but absorbs 4.23, producing a much less favorable striking differential.
The recent form of these fighters also favors Petrino. Since moving to heavyweight in July 2025, he has beaten Austen Lane by first-round submission, Thomas Petersen by third-round knockout, and Steven Asplund by unanimous decision.
Spivac's recent record is more mixed. He defeated Marcin Tybura by first-round submission in August 2024, lost to Jailton Almeida by first-round knockout in January 2025, then lost a decision to Waldo Cortes-Acosta before defeating Ante Delija by decision in February 2026. Against Delija, Spivac landed 67 of 149 significant strikes and recorded 1 takedown, while Delija landed 61 of 172. Spivac also accumulated 3:00 of control time.
The matchup gets particularly interesting after the opening round. Spivac's historical output has tended to increase as fights continue, with his output rising substantially in fights that reach the third round. Petrino has also shown an ability to maintain his work rate late, though his average UFC fight lasts 10:34 compared with 8:22 for Spivac.
There is also a quality-of-opposition consideration. Spivac has spent much of his UFC career against established heavyweight competition and is currently ranked No. 9. Petrino's recent heavyweight run has come against less established opposition, although his 14-2 overall record and 7-2 UFC mark indicate that he has already accumulated substantial experience of his own.
The distinction between prediction and wager is important here. Petrino is the side I expect to win, but the available price leaves almost no mathematical cushion. The model's 59.6% win probability translates to a fair price of approximately -147, so -149 is just inside the playable range. If the market moves to -150 or more, the value disappears under our model.
My projection is a tightly contested Petrino victory, most likely by decision or a late finish after Spivac is forced to spend too much time striking. The betting recommendation is Petrino on the moneyline, but only at -149 or better. Even then, bettors may wish to wait until they have more of an edge elsewhere.
