Valter Walker warns UFC heavyweights after rare calf slicer finish

Brazilian heavyweight Valter Walker submitted Thomas Petersen in the first round at UFC Abu Dhabi, marking only the fourth calf slicer in Octagon history and extending his run of first-round finishes. The Ultimate Fighting Championship contender, nicknamed "The Foot Hunter," warned division peers about grappling exchanges after Petersen defended an initial heel hook. The win stretched Walker's streak of submission victories to five and followed four consecutive heel hooks entering UFC Abu Dhabi. Walker (16-1) now owns six submissions and six knockouts and is targeting a high-profile matchup at UFC 333 in October at Etihad Arena in Abu Dhabi. He said he plans a short break before consulting his manager on potential opponents.