Hey Dimitri, yeah the problem with humidity is really annoying and it does happen at some venues. When the ball and rubbers get humid the grip is just gone and it becomes so difficult to play. We have had the same problem sometimes at venues this season as well and my game is the same as yours my spin is important and it kills me if it’s humid. The problem is there isn’t that much you can do to stop this. One of the best ways is seeing if there is a door to outside or windows that can be opened to let out some of the humidity in the room. Of course this might not be possible and then I would say the only thing I have found that helps is having a clean and dry towel which you can wrap around you bat and press onto the rubbers, this help take out the moisture and makes it a bit better. Of course it doesn’t last that long because the humidity builds up again but it does make a difference for a few points usually.
For the second point I totally understand, being inside at a tournament can be a long day with a lot of effort and focus needed. I find a good way is to make sure between matches to give yourself time to reset, so going outside for some fresh air can really help. Also making sure to drink enough water and eating food throughout the day. Also sometimes at tournaments you can end up speaking a lot to friends and other players, but this can also drain your energy and sometimes it’s good to just be by yourself for a while and maybe listen to music or just relaxed and not have to concentrate at all. This is what I’ve found can help some players!
I hope this helps and any other questions on this just let me know.
Tom 🙂