I finally beat all the master tournaments today. It felt frustrating unfair because the opponents never have to break for curves, always have nitro when you approach them and on many courses the road is too narrwow so you don't have a chance to pass by and If you try the enemies will make crash next to the road. But somehow I managed it in the end. Greece was the hardest tournament on Master difficulty.
I did most of them with Nano, because Gentlemen felt too slow on straight routes.
Good luck everyone.