Thank you for the question and congratulations on your decision to proceed with breast reduction surgery; this operation tends to be one of the most patient pleasing operations we perform.Your plastic surgeon will be your best resource when it comes to returning to your specific line of work. He/she will know how you are progressing and whether or not you have experienced any complications. Generally, most patients are able to return to the “desk job” within 5 to 7 days. More strenuous work, for example involving lifting or extensive upper body movement, will require more time off. Tennis, given the strenuous nature of the sport, would require a longer period of time off (in my practice I would recommend 6 to 8 weeks away. Generally, I ask patients to ease back into activity slowly and "listen to their bodies" as they do so. Best wishes.