ITF signed a massive $3 billion (£2.42 billion/€2.7 billion) partnership with Kosmos - founded by Spanish footballer Gerard Pique -  in 2018 to help "transform" the Davis Cup.

However, the deal ended two weeks ago, casting doubts over the future of the premier men's tennis team event.

"The Grand Slam tournaments are united in their support for the Davis Cup competition, recognising its historical significance and important role in growing engagement in our sport around the world," the Grand Slam Board said in a statement.

"We believe there is an opportunity to engage in further discussions with the ITF and ATP regarding the future of the Davis Cup competition with the ambition of seeing it restored to a premier event with an optimal format and place in the calendar that benefits players, fans and the sport overall."

"Protecting the heritage of the sport and safeguarding major teams competitions such as the Davis Cup and Billie Jean King Cup is a priority for the global tennis community and will appropriately get the Grand Slams' full attention. "

The ITF said that it was looking forward to "positive conversations" with the Grand Slam Board and expressed excitement for the 2023 edition as qualifiers and group stages begin next week.

"We welcome today's statement by the Grand Slam Board re-iterating the status of Davis Cup and Billie Jean King Cup as priorities for the global tennis community," ITF said.

"We look forward to leading further positive conversations with the Grand Slam Board and the ATP as we begin the Davis Cup Qualifiers and Group Stages next week.

"We are excited for another successful edition of the Davis Cup in 2023 and look forward to discussions to continue the future growth of the competition."

The ITF-Kosmos partnership scrapped the traditional Davis Cup format of home and away ties in favour of an end-of-season World Cup-style event.

Last year, the ITF and Kosmos Tennis partnered with the Association of Tennis Professionals to add the Davis Cup to its Tour calendar from 2023.