 According to the doctor. You knew that? You knew that already? Okay. Lee knew that. Well, he's up on this stuff because he studies with Hampton Roads Weight Loss. One cup of diced watermelon contains about 9.5 grams of sugar, which is less than 13 grams in a cup of chopped apples, which I also like very much. I like to take my apples and dip them in the... I take my apples.