"Tennis is a game of 3s".
Doug Lewis, USPTA-1 Certified
Lead Tennis Instructor
Springfield, PA USA
Things in tennis can be quickly analyzed in terms of threes (3s).
3 spins: topspin, slice, and flat
3 service angles: down-the-middle, out-wide, and into the body
3 court regions to hit to: their backhand, forehand or middle
3 court depths to hit to: short, middle and deep
3 net heights for groundstrokes: short for hard & flat shots, medium for deeper shots, high for lobs
3 types of opponents to access: baseliner, net-charger, grinder
3 types of player profiles: tall, short and medium