Andre Agassi quit tennis in 1994.
Andre Agassi . After suffering from sciatica caused by two bulging discs in his back , a spondylolisthesis ( vertebral displacement ) and a bone spur that interfered with the nerve , Agassi retired from professional tennis on September 3 , 2006 , after losing in the third round of the US Open to Benjamin Becker . The ATP Rankings are the Association of Tennis Professionals ' ( ATP ) merit-based method for determining the rankings in men 's tennis .