The controversial $3 billion (£2.5 billion/€2.8 billion) deal was reached with the investment group founded and ran by former Spanish footballer Gerard Piqué in 2018, and had been set to run for 25 years.

The agreement moved the Davis Cup away from its traditional 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.

However, the agreement has been brought to a premature end, and although the format is set to remain in place for this year's Davis Cup, the future is uncertain.

"The ITF can confirm that its partnership with Kosmos Tennis for Davis Cup is ending in its fifth year," an ITF statement read.

"The ITF negotiated a strong deal for tennis in 2018.

"The partnership increased participation, prize money and interest in Davis Cup and produced funding to support the global development of our sport."

It has been reported by AFP that the ITF and Kosmos were unable to agree a deal on financial terms.

However, the ITF insisted that it is in a position to manage the Davis Cup without the Kosmos partnership.

"The ITF has ensured financial contingencies are in place and, as the custodian of the competition, will operate the 2023 qualifiers and finals as scheduled, with the Final 8 taking place in Malaga, Spain, this November," it said.

"As well as being focused on delivering another spectacular edition of the men’s World Cup of Tennis, we are focused on the future growth of the largest annual international team competition in sport."

Hosting ties under the home and away format had proved challenging for National Federations and the Davis Cup struggled to attract the sport's top players, but the changes proved divisive, with most matches not involving Spain at the first Finals event in Madrid in 2019 featuring low crowds.

High-profile critics included former world number one Lleyton Hewitt of Australia, and leading players including Serbia's Novak Djokovic did not play at last year's Davis Cup.

The Davis Cup format has been tweaked again since 2019, with the 2021 edition played in three cities across 11 days.

Teams played in a group stage across four cities in September last year, with the top eight advancing to the knockout stage which was held in Málaga in November.

The Martin Carpena Arena in the Spanish city is due to host the knockout stage again this year, and the Minister of Tourism, Culture and Sports in Andalusia's Government Arturo Bernal has reaffirmed its commitment to staging the event despite the ITF and Kosmos severing ties.

"The Junta de Andalucía negotiates its agreements with the main International Federations, so we are fully committed to the ITF and Málaga will host the Davis Cup Final again this year," Bernal said.

"This event was an organisational success in the last edition held at the Martín Carpena Sports Palace, and we are also convinced that in 2023 it will be as well.

"Our commitment to sport in Andalusia, and in this case with tennis, is determined."

ITF President David Haggerty added that he believed last year's Davis Cup was "a great success".