Confused on how to get chests
So if a team mate in my premade gets an S, i get a chest right. What if that premade already has an S on that champion? Now it shows ive gotten 2 of 4 chests. Next chest available in 4 days. Does that mean that i cant get another chest for 4 days or does it mean ill jsut be able to get one extra chest after 4 days?