The Albion boss handed Holland under-21 international Bart Verbruggen his debut in place of Jason Steele against West Ham.
Having made crucial saves in the first two games, Steele remained on the bench against the Hammers.
Roberto De Zerbi said: “They will play depending on the opponent, depending on the physical condition, but I believe in Bart the same way as Jason. They will play 50% of the games this year. We are lucky to have in our squad two great goalkeepers.”
Verbruggen, who was blameless on the West Ham goals,
Roberto De Zerbi said: “Jason was doing really well but the thing is that we have a team where in every position we have more players who can play and make an impact. I think that’s the biggest strength about this team. If a person gets replaced, nothing really changes. Of course everyone has his own characteristics and qualities, but there’s no huge changes. I know that’s a strength of the team and everybody needs to be ready every week and that’s what I try to do.”