England players, such as Wayne Rooney and Theo Walcott said at the time that they heard members of their team suffer abuse, but Swansea defender Williams will not be giving that a second thought when Wales look to continue their run of good form at the Vasil Levski Stadium.
He said: "I haven't even thought about it. I am not worried. You can ask me after the game. If it happens I am sure I will have something to say but I haven't thought about it too much.
"I experienced it a little bit when I was younger but not in recent times. We do a great job here and we had the (Show Racism the Red Card) T-shirts on again on Friday night and everyone is conscious of it, but if there is a problem there they need to sort it out and I am sure they will.
"You get a lot of stick from away fans anyway and I am big enough to deal with it and it's not going to affect any of us. If it happens we will speak about it after the game, but hopefully it will not."