Tennis elbow is thought to be caused by small tears of the tendons that attach the muscles of the forearm to the arm bone at the elbow joint. The muscle group involved in tennis elbow, the wrist extensors, function to cock the wrist back. Patients with the tennis elbow syndrome experience localized pain on the outside of the elbow that is worsened by grasping objects and cocking back the wrist.
For more information: Tennis Elbow

