Players will be allowed to consult their coaches on court as part of an experiment being tried out by the Women's Tennis Association.
Mid-match coaching is to be tried out at two tournaments
The trial will take place at tournaments in Montreal and New Haven, Connecticut in August.
Players will be able to consult their coach once per set as well as at the end of sets.
"It will be really interesting for players and fans," said former US Open champion Svetlana Kuznetsova.
"I think fans will enjoy this new element and I know that as players we're interested to see how it works."
If a player takes a medical or bathroom break, only the opposing player may request her coach.
Breaks called while a set is in progress will only take place during the time allowed during changeovers, to avoid delays in play.