Originally Posted by Torres
I'd say its mostly spin and rotations on the ball (and the more awkward trajectory that that entails together with the movement of the ball off the bounc) that drops off and from about 4-5 hours. It starts to lean towards a synthetic gut in terms of the amount of action (or lack of action) that you can put on the ball. You can still boom a flat ball if you want to but flat balls are easy to return -opponents just use your pace - unless you can get it past your opponent. But that's akin to having to constantly hit winners. Still plays better than synthetic gut though, even after 5 hours.
Do the strings start moving around/get stuck out of line at that 4-5 hour mark?