
There is one Italian guy who had served 41 double faults in 11 matches, I set his cold blood and concentration to 1, and the other stats he has look like at the picture.

But by playing with his stats like that, I have just decreased the percentage of his 1st serve to very low value (between 10-25% depending on a match), and in 8 simulated matches Inc-10 vs Inc-10, he served just 2 double faults, so 14 sets and just two DF :/ Is there any way, to make him more error-prone?