Wolves were controversially denied by VAR and Leicester's Hamza Choudhury was sent off in a stormy 0-0 draw at Molineux on Friday.
Nuno Espirito Santo's side thought they had taken the lead when Willy Boly headed home in the first half, but VAR stepped in to chalk off the goal for the tightest of offside calls against Diogo Jota.
Wolves were furious, but the officiating turned in their favour after half-time as Leicester had a penalty appeal turned down before midfielder Choudhury was sent off for a second booking.
Leicester remain third in the Premier League, one point behind second placed Manchester City as they bid to qualify for the Champions League.
Leicester boss Brendan Rodgers will be encouraged by his team's second clean-sheet in their last 11 league games, especially as they had to withstand a late Wolves barrage.
But the sight of Jamie Vardy failing to score for a sixth successive league match meant it was not all good news for Rodgers.
Wolves had returned from a winter break in Spain for the 42nd game of a gruelling season that started with Europa League action back in July.
But they never looked fatigued in a bruising encounter and climb to seventh in the table.
Pedro Neto cut into the Leicester penalty area and found Jota early on, but Wolves winger's low shot was blocked by the outstretched leg of Leicester keeper Kasper Schmeichel.
- Wolves fury -
Neto was the provider again when Leander Dendoncker glanced just wide from his corner.
Caglar Soyuncu should have put Leicester ahead but he nodded straight at Rui Patricio from James Maddison's free-kick.
Wolves defender Matt Doherty needed lengthy treatment to close a gaping wound that left blood pouring from his head after a clash with Maddison.
Doherty was eventually able to continue and played a role in the move that nearly brought Wolves the opening goal in the 44th minute.
Neto's cross was flicked on by Doherty to Boly and he headed home, only for VAR to disallow the goal for an extremely tight offside against Jota, who had passed to Neto in the build-up.
Wolves captain Conor Coady was furious with referee Mike Dean as the players walked off at half-time, reportedly shouting "You're the referee and even you don't know" at the official.
VAR went in Wolves' favour after the break when Maddison appeared to be shoved over by Romain Saiss in the penalty area, with Dean giving a goal-kick and the review system backing his assessment.
And it was Leicester's turn to suffer at the hands of Dean again in the 76th minute.
Already on a booking, Choudhury slipped over and lost control of the ball, reacting with a lunging tackle that sent Dendoncker sprawling.
Wolves nearly took advantage of their numerical superiority when substitute Adama Traore picked out Raul Jimenez for a header that flashed over.
Jimenez was guilty of a worse miss in the closing moments when he again failed to hit the target with a header from Joao Moutinho's delivery.
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