In terms of playing ability there is nothing to choose between number one and 100. Instead, it's a question of who believes and who wants it more? Which player is mentally stronger? Which player is going to fight the hardest in the big points? These are the things that determine who is the champion.
When you look for the environment, you find things that are in it: a hammer, a smartphone, some rusty nails, a shed, a spider, some grass, a tree. So there is a big difference between environmentality and Nature. Nature is definitely something you can point to: it is 'over yonder' in the mountains, in my DNA, under the pavement.