Rain at an outdoor tennis tournament removes playing hours that cannot be recovered. What follows is a scheduling problem that alters the competition itself.
Court capacity is the binding constraint
A tournament can only play as many matches at once as it has courts. Losing a day does not shift the backlog forward; it stacks matches onto days that were already full.
Outside courts have no lighting in many venues, which caps the playing day regardless of how many matches remain and how willing players are to continue.
Covered courts help but cannot absorb a whole day's programme, so they become a scheduling privilege that concentrates attention on a small number of matches.
Recovery time is the first thing sacrificed
Restoring the schedule usually means asking players to compete on consecutive days, and in severe cases twice within one day.
That falls unevenly. A player whose matches have been short is far better placed to absorb it than one who has been through several long five-set contests.
Because physical recovery is a genuine performance factor, the compression changes the probability of results in a way that has nothing to do with tennis.
Interrupted matches restart differently
A match suspended mid-set resumes with the score intact but with everything else reset. Momentum, rhythm and the read a player had on an opponent's serve do not survive the break.
The player who was behind generally benefits, since a pause interrupts an opponent's run and allows coaching input and a change of tactics between sessions.
Where a break spans overnight, conditions themselves change. A match that began in humid afternoon air can resume in cool morning conditions where the ball travels differently.
Roofed courts create two tournaments
When play continues under a roof while outside courts sit idle, players in the covered matches face still air and stable bounce while everyone else waits.
Closing a roof also changes the conditions materially, typically making play slower and more humid, so a match that begins outdoors and finishes covered is played under two sets of conditions.
Scheduling decisions about who gets the covered court are therefore competitive decisions, which is why the criteria for them are published and argued over.
The draw absorbs the disruption unevenly
Half of a draw may be far more delayed than the other half, depending on which courts lost play. Players then arrive at the same round having had very different weeks.
Organisers try to balance this by prioritising the most backlogged section, but the courts available do not always align with where the backlog sits.
By the second week the schedule has usually recovered, and the effects persist only in the accumulated fatigue of the players who came through the compressed days.
