He took the decision to withdraw Engels from the action with 15 minutes of the 5-1 victory left to play.
Ezri Konsa was handed his Premier League debut with a brief cameo as he replaced the Engels for the closing stages.
The Belgian international appeared to have hurt his knee in an innocuous challenge with Canaries striker Teemu Pukki.
"Yeah, he's okay," Smith confirmed. "He wanted to carry on but I made the call very quickly.
"We were defending a corner it was 4-0 and I wanted to keep it that way.
"Ezri got his first minutes in the Premier League as well."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!