There were also a number of incidents where Chelsea players appeared to dive for penalties in the match. A video of Chelsea's antics should autoplay in the picture box for UK users.
Potters boss Pulis was furious Luiz received only a yellow card from referee Michael Oliver for the tackle on Walters in the closing stages of the game. But the Welshman was even angrier the challenge could not be examined retrospectively under FIFA rules, which state video replays can only be used to punish players if officials have had no view of an incident.
Pulis said: "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."
He added: "It's a like a policeman watching a bank 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 gonna arrest him.
"It's absolutely crazy - ridiculous."