when is a tie break used in tennis
Tennis scoring system A set is won by the first side to win 6 games, with a margin of at least 2 games over the other side (e.g. 6–3 or 7–5). There is usually a tie-break if the set is tied at six games per player.
Maximum break Breaks greater than 147 are possible in a free ball situation. This has been achieved only once in professional competition, when Jamie Burnett made a 148 break in the qualifying stages of the 2004 UK Championship.