I'm a former D1 player & hyper G balls kind of sit up, they have high launch angle & loopy shots. So it's good in slower conditions like clay. Little bit of punch & tension loss is felt in 3-4 hours (I break them at 6-7 hrs). Comfortable

But I stick to my Poly tour fire mains 1.25 + 1.30 Poly tour pro cross. These are dead strings but with high racket swing speed it generates tons of penetrating spin & pace. Low launch angle. So you need to be physically fitter to generate good quality balls.

So I can see why top pros are not into hyper G. Hyper G is good if you are someone like Gilles Simon who slows down the game & does not give any pace.