Solved

Training

Hi, my 18 years old driver (Favalli) has made no progress in skills since the day before yesterday...he has reached 100 in training twice in two days, but nothing changed in his skills. He has 4 stars and a half...

Thanks for your support

Make sure you change what category you are training him in.

all categories, and he has no 20s, except stamina

I really don't understand

Train a specific category, and see if it improves. Since Physical is fully trained try the other two categories.