atcrossover - i practice all of that and do it great. i dribble down the court fullstep, crossover and go left fullspeed and everything is fine.

but today i played a pickup game, and not even against good competition. so i tried to use the left and it was terrible. i tried dribbling it down with the left on a fast break and it felt awkward as hell. i got ripped trying to drive in left too. then, when ide make a cross to the left, my body would freeze up and not want to take off and go left.

any suggestions on how to bridge this mental gap between practice and the game?