Who doesn't think they need more sleep? Everyone is different, so the key is to find out how many hours of sleep you need each night for your body to recover and wake up rested to face the day. 

Sleep is the most underrated performance enhancer in sports. It improves reaction time more than caffeine, builds muscle better than protein powder, sharpens decision-making more than film study, and protects you from injury better than any brace or tape job

I do not feel a gradual decline in my arm strength, but the fatigue comes on all at once as my arm hits its breaking point. I usually try to push through the fatigue and only come out of the game when my coach pulls me because he notices that my arm is worn out.