Hi. the shadow on the image is more than the right half of the apple. You can see a clear dark oval shape. You should try to make the shadow a single shape. The ambient/bounced light you have created (brighter areas in shadow) are too bright- as bright as your midtone. Remember it is still a part of the shadow- and thus should be much darker. Only slightly lighter than rest of your shadow. Watch this video by Marco Bucci- https://www.youtube.com/watch?v=gwLQ0cDb4cE hope its helpful.