No, a macroscopic object like a tennis ball cannot be described by a single wave function in the same way as quantum mechanical particles are described. Quantum mechanics is primarily applicable to microscopic particles such as electrons, protons, and atoms.
The wave function in quantum mechanics represents the probability distribution of finding a particle in different states or locations. It is a mathematical description that allows us to make predictions about the behavior of particles on a microscopic scale. However, macroscopic objects are composed of an extremely large number of particles (e.g., atoms and molecules) that interact with each other in complex ways.
The behavior of macroscopic objects is governed by classical physics, which describes the motion and properties of objects in terms of classical mechanics, thermodynamics, and other macroscopic theories. Classical mechanics is an effective approximation for macroscopic objects, and it does not involve wave functions or quantum mechanical equations like Schrödinger's equation.
While quantum effects may become relevant in some very specific situations involving macroscopic objects (e.g., superconductivity or Bose-Einstein condensates), the overall behavior and description of macroscopic objects are well described by classical physics rather than quantum mechanics.