How do I get chests ?

In your collection it shows if you already received a chest with that champion but this is what I do..

Go into norms play a support that you haven't played with and get your ADC fed and then win the game it works everytime.

Hey you need either your self to get an s or s+ or your teammate and if you check your collection and it has boxes around your champion like the icon means you've gotten a chest on him and you get a new one and keys are honor now.