How long will it take to get a 6 pack with this exercise?

On Mondays and Wednesdays i have soccer practice from 7-8:30 and then on the weekend i also have 1 game every weeked…..the days that i dont have soccer practice, i play basketball for an hour or more……and not just shooting around and walking to the ball…i run for the ball and practice alot of those things, also everyday of the week i do ab exercises for about 20 minutes each day…….should i step it up and do more basketball and more ab workouts to get a 6 pack or what should i do?