A.8 - Warm-up Times
Once all players in a match have been informed
what court they will be playing on, singles players are allowed up to 5
minutes of on-court warm-up time and these warm-up times run
concurrently. For doubles, each team is allowed up to 5 minutes for
on-court warm-up and while these times do not run concurrently, both
teams’ warm-ups must be completed generally within a 10-minute period
that starts when the first team begins its warm-up.