sentences:  Corner retirement
  
  A corner retirement or corner stoppage, abbreviated "RTD" by BoxRec, are terms used in boxing to describe a fight that ends when, during any rest period between rounds, a boxer refuses to continue or their corner pulls them out, thereby forcing the referee to call an end to the fight.In contrast, a technical knockout (TKO) may only be declared by the referee or ringside doctor, at any stage of the fight including rest periods.