Tennis elbow for 20 years never played tennis. The band with velcro works for me. I even tried a magnet along with band, also worked. Being frugle(or cheap) I used a business card magnet under the band. Rubbing with Ben-Gay or similar rub helps. Also, taking Aleve for inflamation helped me.
Notice when you use the first 2 fingers, pointer and index fingers, these are the ones that create the pain.