The lateral epicondyle of the humerus is a small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow joint, and to a tendon common to the origin of the supinator and some of the extensor muscles. Specifically, these extensor muscles include the anconeus muscle , the supinator , extensor carpi radialis brevis , extensor digitorum , extensor digiti minimi , and extensor carpi ulnaris .  In birds , where the arm is somewhat rotated compared to other tetrapods , it is termed dorsal epicondyle of the humerus . In comparative anatomy, the term ectepicondyle is sometimes used. 
It’s a very common intervention that combines the use of deep transverse friction (DTF) with Mill’s manipulations, which was used with success by Cyriax and Cyriax for treating lateral epicondylitis. Both the treatment components mentioned above must be used jointly in the sequence specified. Patient must follow the protocol three times a week for four weeks. 
There are several contraindications regard to this therapy: active infections, bursitis, disorders of the nerve structures, ossification and calcification of the soft tissues, active rheumatoid arthritis, anticoagulant.
Rajadurai et al demonstrate that supervised exercise program may be the first treatment in managing tennis elbow in comparison to Cyriax physiotherapy. Much more studies should be done to prove the evidence of using manual treatment like Cyriax physiotherapy.