Final version August 22

Is it possible to change sponsor in career mode?
For example, let’s take Daniil Medvedev. His sponsor is Lacoste, but after playing for several seasons we are offered various sponsors: Adidas Nike, etc., but it’s impossible to change the player’s clothes, I just tried it and it turns out that my sponsor is Nike, but I play Lacoste.
What if you create your own player in career mode? Suppose I create a uniform for him without any sponsors at all, but Nike offers me a contract for the season, will I be able to choose a Nike uniform from the clothes and play in it?

Is it also possible to add old Nike uniforms? For example this: