Sloane Stephens said on-court coaching created a connection between players and fans.
The AELTC said it had studied data from the past 20 years at Wimbledon, as well as consulting players and officials before reaching the decision.
At the moment, on-court coaching is only allowed in WTA events but not on the men’s ATP Tour or at the four Grand Slams.
After withdrawing from the Kremlin Cup, Nick Kyrgios said he was heading home to prepare for the 2019 campaign.
Simona Halep had pulled out of last month’s China Open and withdrew from this week’s Kremlin Cup because of the persistent problem.
Gerard Pique believes Rafael Nadal and Novak Djokovic will both play in the reformed Davis Cup next year and has said the door remains open to Roger Federer.
Rafael Nadal headlines the list of players expected to compete at the 2019 Mexican Open in the Pacific resort city of Acapulco.
Simona Halep played two Grand Slam finals winning the French Open crown and won titles in Shenzhen and Montreal.
Djokovic climbed one spot up to second after claiming the Shanghai Masters title for the fourth time in a row.
Juan Martin Del Potro, the US Open runner-up to Novak Djokovic this year, hobbled out of the Shanghai Masters last 16 against Borna Coric on Thursday.