Blood sugar 160 after 1.5 hrs of tennis. Consumed 1 Nutragrain bar near end of tennis match. Small meal before match. 160 too high given this info?

Different test. To diagnose someone with diabetes you need a more controlled test like a fasting blood sugar or hemoglobin a1c. A random glucose measurement after eating and exercise has too many variables to account for and may or may not be normal. If you are worried about being diabetic, talk with your doctor and they can get you the right test to give you a solid answer. .