As basketball season has come to a close, it makes way for tennis for me, and there is plenty of physics in tennis.
First off, the tennis racket itself has engineering to allow the ball to fly with maximum velocity. Many cords are woven in the foundation of the racket, the strings have a strong tension in them and as result the hard tension allows for a ball to bounce of the racket and change direction. The rackets tensions are rated in force, specifically pounds (maybe newtons in Europe).
anyway that's just a little bit on tennis. There is plenty more such as kinematics and momentum, but that's for another blog.