Tottenham boss Ange Postecoglou believes goalkeeper Guglielmo Vicario is being targeted.
Postecoglou says they've contacted ref chiefs about the situation.
He said, "I haven't [had conversations with the officials]. I struggle with that stuff. Like I've said before, I've kind of always been the one who says you've got to respect the referee's decision or the umpire's, but I think we have sent some stuff to get some clarification.
"I'm going to get called out for this, but there was a thing that was quite evident in the game that the goalkeeper was a protected species. I don't think that's just me making that up. The reason people used to say that was that if you really impeded a goalkeeper in any way in the six-yard box, you are going to get a foul. I knew that as a player, I knew that as a manager.
"There seems to be a shift there. Somebody will say to me that the rules haven't changed but I think there's been a shift there where now to me, it's obstruction. If you're standing in front of a goalkeeper stopping him before a ball has even arrived, in layman's terms that's obstruction. Now someone is going to tell me that that's not a law either, it wouldn't surprise me.
"But it was something that I kind of thought was part of the game. I've seen it in general play, I've seen our guys get blocked trying to close people down by other people and I'm finding it bizarre that it's not being pulled up anymore. With the goalkeepers, what's that going to do now? Well, it's pretty much opened it up that you can surround the goalkeeper and crowd him and put balls on top of him and just wait for the scramble to finish and see what happens."
