Swansea goalkeeper Michel Vorm has been ruled out for up to six weeks.
Laudrup's one gripe was Angel Rangel's yellow card for diving which means a one-match ban.
He said: "Angel got a fifth yellow card - that was really something, that was something special. I have to admit that.
"A free-kick against and it was strange. If that is diving, then we have invented a new form of diving. I have to ask Angel how he learned that."