Cherry Tree - Insect or Leaf Burn

I just potted this cherry, there are a few leaves what appear to have insect damage or leaf burn?

The second leaf simply looks old. The one with the damage on the margin doesn’t look much like insect or burn - it could be physical damage. In general the tree looks OK but could be healthier. Makes me wonder what the health of the roots and the soil is like.

I don’t dare do any root work until the tree shows a year or two of foliage growth. I don’t know the history this tree, however when I picked it up it was pretty much abandoned to its nursery pot.