One thing that I have tracking lately with clients is a connection between serratus anterior tension/tenderness and levator/upper trap tension, especially when paired with pectoralis major tightness and scapular protraction. Tenderness to the inferior/lateral scapula and into the side of the ribcage seems to be present in many clients (male and female) who also have protracted shoulders and pain to the upper shoulders.
I am curious to know if other therapists are seeing a similar correlation.