Does the one year warranty for MBP 13" Retina display cover screen replacement

"Defects in materials or workmanship"

Most genius Bar technicians do not believe that glass can spontaneously break, and so they attribute broken displays to mis-handling, not latent defect. You are likely on the hook for replacing the screen "out of pocket".

No, one-year warranty does not cover screen replacement. However, if your device is registered with AppleCare, then Apple will repair your device for a fee. If you wish to repair your mac without AppleCare, open the following link to set up a repair with apple.

https://getsupport.apple.com/?caller=cupsorc&PRKEYS=

If the damage is accidental warranty will not cover it. If it is a defect, then it will.

Good luck.