What is it?

This is the percentage of times a player wins the set after breaking serve in one of the first 4 games of the set.

Why we like it?

Emphasises the importance of the fast start, particularly with some players in mind given how highly effective they are at winning a set after securing an early break The stat is calculated from performance on hard courts only over the past 12 months. Djokovic, exceptional as a front runner, converts early breaks to the tune of 93%. An average number on the men's side of the game would be mid-70's. Max Purcell sits much lower than that at 62% on this stat, indicating he can be chased down after securing an early break over the past 12 months.

When we use it?

Ideally used immediately following an early (in the first 4 games) break occurring when a player's conversion percentage (how often they go on to win the set) can be compared back to the average of the entire tour. Leads a commentator into talking to how difficult the task may be to fight back or perhaps how the contest is very much alive as the break may well be given back at some stage based on what the specific number is.

* Win Set After Early Break is based on hard court matches played over the previous 12 months.