Answer: tiebreakers

AnswerCrossword Clue
TIEBREAKERSFed-up Fathers Day fathers?
TIEBREAKERSSome sets end in them
TIEBREAKERSThey end close matches
TIEBREAKERSOvertime periods
tiebreakersTIEBREAKER, a deciding game in a set at tennis
tiebreakersA means of deciding a winner from competitors who have tied, in particular (in tennis) a special game to decide the winner of a set when the score is six games all