STANDARDS SECTION XVIII - TOURNAMENT STANDARDS OF PERFORMANCE is aggravated during the warm-up or the match and requires  medical attention at the change of ends or set break. Players may not receive treatment at any time during the match (or  warm-up) for the following conditions: ii.  Non-Treatable Medical Conditions (a)  Any medical condition that cannot be treated appropriately. (b) Any medical condition (inclusive of symptoms) that will not  be improved by available medical treatment within the time  allowed, specifically chronic conditions such as overuse injuries  and recurring injuries. (c)  General player fatigue. (d) Any medical condition requiring injections, intravenous infusions, or supplemental oxygen, except for diabetes for  which prior medical certification has been obtained and for  which subcutaneous injections of insulin may be administered. b.  Medical Evaluation i. Purpose The purpose of the medical evaluation is to determine if a player  has sustained or aggravated a treatable medical condition and, if  so, to determine when medical treatment is warranted and whether  a Medical Time-Out (as further described in sub-Section c below,  “MTO”) is necessary. The development of the condition need not be  witnessed by the Chair Umpire. ii.  Player Request and Process If at any time during the warm-up or the match, the player believes  that medical evaluation and treatment are required, she may request,  through the Chair Umpire only, to see a PHCP. The Chair Umpire may ask the player if she is able to continue  playing; however, the Chair Umpire is under no obligation to do so. The player has the option to: (a)  Stop play and wait until the PHCP arrives, only in the case that  354