Lucky Losers  - Players who are placed in the Main Draw to fill vacancies after they have been eliminated in the final Qualifying round or, if more Lucky Losers are required, in the previous Qualifying round(s). 

Manufacturer  - The manufacturer of a player’s clothing or equipment. 

Medical Condition  - A medical illness or a musculoskeletal injury that warrants medical evaluation or medical treatment. 

Minimum Player Compensation (MPC)  - A Tournament’s minimum gross publicized compensation paid to players. 

Modification of Play  - A ten (10) minute break allowed between the second and third sets when the Heat Stress Index (WBGT) meets or exceeds 30.1 degrees Celsius/86.2 degrees Fahrenheit or the Heat Index (Apparent Temperature) meets or exceeds 34.0 degrees Celsius/93.2 degrees Fahrenheit. 

Off Season  - November and December of a calendar year. 

Official with International Certification - An official who has successfully passed the ATP- ITF-WTA Joint Officiating Program school, proven by earning an international certification as a referee (gold and silver badges), chief umpire (gold and silver badges), or chair umpire (gold, silver, and bronze badges). 

Out of Competition  - Not participating in any Tennis Event other than an Exhibition/Non- WTA Event for which a player was granted a waiver or competing in any other organized sport. 

Out-of-Competition Period  - A period during which a player is Out of Competition for a minimum of twenty-six (26) weeks, which for a particular player is calculated using the last day of the last Tennis Event that she played and the date of her Return to Competition. 

Parental Start  - Adoption, surrogacy, or becoming the legal guardian of a person under the age of eighteen (18). 

Penalty - Financial or disciplinary action taken against a WTA player or Tournament that fails to fulfill their professional obligations or violates a Rule. 

Performance Bye  - The type of bye awarded to a player based on her previous week’s performance as determined by the WTA when approving the calendar and draw sizes. 

Player  - Any professional or amateur woman tennis player, whether a member of the WTA/ WTBA or not, who applies to enter a Tournament. 

Player Support Team Member  - Any coach, trainer, manager, agent, medical, paramedical, family member, tournament guest, or other similar associate of any player. 

