Southampton head to The Hawthorns on a 10-game unbeaten run in all competitions and fresh from knocking Premier League Fulham out of the FA Cup.
Tonda Eckert’s Saints are also eyeing a play-off spot and are only four points adrift of the top six as they face an Albion side that have not won at home since 29 December.
Morrison says Southampton’s confidence “will be high” but has challenged his players to believe they can beat anyone in the league.
“We’re treating every game that comes now as one we can win and to challenge them,” he said.
“We’ve got to think of backing the result up with a positive one. So we’re ready. We are keeping the mood good so they’re not always thinking about the outside noise – concentrate on the group in here and when it’s game time we’re focused.
“We’ve got to get the ball rolling. And that’s what I’ve been saying since Saturday [to] back it up again and back it up again, [with] positive performances.
“A big focus is on getting this home form good again, because there’s no better place than when The Hawthorns is bouncing, and it’s up to us to make that again.
“I’ve been put in this role and you’ve got to step up. That’s how I see it.
“I’m going to stick my chest out and I’m going to do the best I possibly can and as long as I can put my head on the pillow, I’ve done everything I can, that’ll do me.”
