Blackburn Rovers’ key men were both substituted after appearing to pick up muscle issues. Both walked off the pitch but looked to have sustained knocks.
Mowbray is confident both are fine though and expects them to be available for Tuesday night’s trip to Bristol City.
“I don’t think so,” Mowbray told BBC Radio Lancashire.
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“Montgomery was always part of the plan too. He was supposed to do an hour but he looked alright and said he was fine.
“Then he started to cramp up so rather than turning that to a muscle tear, he came off.
“Mori took a knock but he’s pretty resolute; he’s a strong boy. I don’t think there is an injury there, though I haven’t really spoken to them at this moment.
“I don’t think there’s an issue. He wants to play, wants to train every day. Doesn’t want an easy time, he’s a machine really.
“I am pretty confident he’ll be ok as well.”
Tom Atcheson was rotated out of the team against Cardiff after playing four games for Northern Ireland in the international break.
Mowbray wanted to play a back four at home in a winnable match and felt it was the right time to rest him.
“I think at home, it was a game to play a back four,” he explained.
“We didn’t want five at the back and not have enough men to hurt them in transition. It made sense to me, he’d played four games.
“He had an amazing four games for Northern Ireland, no goals against, four clean sheets. Michael is very capable of producing teams that are defensively solid.
“I am happy for Tom and I had a good chat with him. He understands the logic of Hayden playing.
“We have two tough away games coming up so let’s see if we swap them over or add one. We will see what we do in the next ga