Method and apparatus for a tennis watch having a watch-like case containing a central processing unit and an input/output controller connected to the central processing unit, a display driver that takes data from the central processing unit and converts it into the electrical signals required by the alphanumeric display, a program read only memory ROM connected to the central processing unit wherein the ROM contains the operating program for the tennis watch and a clock circuit connected to the CPU. The tennis watch case also comprises an alphanumeric screen having an luminescent background which displays various tennis related data controlled by a plurality of buttons disposed on the watch case.