Allardyce did however, take issue with the fact an earlier challenge by Jon Flanagan on Stewart Downing did not earn the same punishment.
Flanagan’s challenge on Downing left the winger needing treatment in hospital and Allardyce was disappointed by the referee’s response to the incident.
“I wouldn’t disagree with it [Nolan’s sending off], but I would say that there was a very similar if not worse challenge from Flanagan in the first half on Stewart Downing.
“Henderson has not ended up in hospital but Stewart has and he needs 16 or 20 stitches in a massive gash across his calf and Achilles tendon.
“There is more danger in Flanagan’s challenge than there was in Kevin’s but you couldn’t argue that he sent him off. What you do argue is that Kevin has been sent-off and he hasn’t.”