Morrison went down as he stretched for the ball, and it was thought Morrison could have suffered a hamstring injury.
But Bruce told the club's official website: "We had him taken off as a precaution because we feared he could have damaged his hamstring.
"Fortunately, that does not look to be the case and it was just a dead leg. He should be fit to return to training on Monday or Tuesday.
"It was very worrying to see a centre-forward that you have spent so much money on being carried off. I am very relieved it is not a serious injury."