I played in various places in match. In small town, they can play in weird places.
I had competition in a garage, with not so flat flore. I played in tennis room in winter without heater (we played with gloves) at night. I played in big professional basket courts, and standard room.
It is hard to explain, coz I stopped tt for multiple years, but even the ground had impact on the ball behaviour. In some condition the bounce is higher, sometimes lower. In places, the speed is high, whereas other places the speed is low. Same for spin. I never really understand which condition affects the ball in a certain way. But it is like that. Old player knows it and plays with it, especially against young inexperienced player. Coz a shot, we usually do, can not work. So it creates frustration. And we don't always think about that, and we don't adapt.
Usually big room are the better. The condition is more homogeneous.
I think (hypothesis) small room, with low roof, has denser air, with body heat changes completely the ball spin, bounce and speed. For exemple, I played in a room under a pool. Humidity was high, dense air, almost suffocating. The ball was slow, and low spin. The flat attacker was king. My team who played more with spin, was destroyed.
From what I see on video of FZD in Europe. Room are very small compared to the big complex in china or world event. So it makes sense to change the setup for those conditions. What is weird is that he just turn the racket, I think when you are FZD you can have a racket for Europe and a racket for china. Maybe a softer H3 in Europe in FH, and Harder Dignics in BH (ZJK said they had special versions of rubber with harder and boosted sponges) . I would think tweaking hardness is less of a change that turning completely the rackets. Dignics and h3 are close but still different.
