Valter Walker kept his UFC heavyweight submission streak alive at UFC Abu Dhabi, but this time he changed the finish.
Walker defeated Thomas Petersen by submission with a calf slicer at 1:32 of Round 1 on Saturday, July 25, 2026, inside Etihad Arena in Abu Dhabi, United Arab Emirates. The result gave Walker another fast leg-lock win after a fight week built around his lower-body submission threat, including his fake-foot faceoff moment before the Petersen matchup.
Round-By-Round: Walker vs Petersen
Round 1: Petersen tried to make Walker work in the opening exchanges, but the fight quickly moved into the type of grappling scramble Walker has been hunting throughout his UFC run. Walker attacked the leg, forced Petersen to defend the lower-body danger, then adjusted to a calf slicer instead of the heel hook that had defined his previous finishes. Petersen tapped at 1:32, ending the heavyweight bout before it could leave the first round.
Walker Finds A Different Leg-Lock Finish
The method mattered almost as much as the speed. Walker entered the fight known for ripping through heavyweights with first-round heel hooks, but Petersen became the latest opponent to get trapped once Walker found a leg. The official result went down as a calf slicer, giving Walker another rare submission finish in a division where heavyweight fights usually end with strikes or control-heavy decisions.
Walker had already put extra pressure on this appearance by making it clear he wanted stronger contract terms before taking ranked heavyweight assignments. With the Petersen win now added to his streak, that post-fight contract argument has more weight behind it.
The finish also kept UFC Abu Dhabi moving through an action-heavy prelim stretch. Walker did not need a long showcase, and Petersen did not get enough time to turn the fight into a test of pace or durability. One grappling exchange was enough for Walker to get to the leg, change the submission angle, and close the show.
Official result: Valter Walker def. Thomas Petersen via submission (calf slicer), Round 1, 1:32.
