The Brazilian defender launched with two feet into Walters, catching him on the shin, but escaped with just a booking for the challenge and will face no further action.
However, Pulis has explained his frustration with FA rules that allow retrospective measures to be taken, with Branislav Ivanovic’s arm to the head of Michael Kightly possibly facing a review, as Andy Wilkinson’s recent elbow on Manchester City’s Mario Balotelli did, resulting in a three game ban for the Potters defender.
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"The worst thing is that Luiz’s challenge is a very, very poor one but because the referee’s seen it and booked him he’s not going to miss a game.
"It’s a like a policeman watching a robber rob a bank and because he’s seen it, the police are going to let him off. Whereas if he didn’t see him. they’re going to arrest him. It’s absolutely crazy. Ridiculous."
Despite his frustration, the manager made a point of praising the referee on dealing with Chelsea’s penalty claims over the course of the match, one of which saw Oscar given a yellow card for diving.
Pulis added: "You’ve got to let the referee control the game and I felt Michael Oliver did smashing at times, especially for the number of times players went into the box and fell over."