The midfielder fell awkwardly in a challenge from Sebastien Bassong and was forced from the pitch with a serious ankle problem which changed the complexion of the game after he had scored earlier.
Laudrup felt the incident was simply a part of the game but did suggest Dyer's absence contributed to Norwich getting back in the contest.
"I think the game changed in two ways with the injury. Things like this are part of football, even though we don't know how bad it is yet, but everybody could see it was not good when you get carried out like that," said Laudrup.
"We are all human, the team had 10 minutes where they suffered a bit and tactically we also lost our main threat with the runs from the second line, like when he had scored the goal."
On the extent of the Dyer injury, Laudrup added: "You just go from playing one second to being out for you don't know how long.
"We will wait to see the X-ray and then in a couple of days have an MRI scan to know if it is bad or really bad.
"Let's wait and see, hoping that if it is bad, it is not too bad."
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