Gerard Pique is confident Rafael Nadal will play in the revamped Davis Cup next year and says he has "not closed any doors" on Roger Federer being involved.
The Barcelona and Spain defender is the president and founder of Kosmos, the company promoting the new format to the competition.
Under the much-changed structure for 2019, an 18-team event will be condensed into one week in November, featuring six groups of three, with the pool winners and two best runners-up advancing to a knockout phase.
Rather than ties consisting of four singles and one doubles match, played over five sets, the truncated version will see only three-set affairs, each tie comprising two singles and one doubles contest.
November is traditionally the month when top players begin their time off at the end of the season, while the ATP World Team Cup is expected to take place in Australia early in 2020.
However, Pique remains confident that the sport's biggest names - Nadal, Federer and Novak Djokovic - will feature.
"I have spoken with all those players," he told a media conference.
"With Rafa [Nadal] it is very positive. If he does not have an injury, he will be there. Rafa is very positive about this event, especially because it is taking place in Madrid.
"If the number one in the world is playing, that's more than enough.
"On Novak [Djokovic], if he has to choose between the two, he says he will play the ATP tournament. I took the opportunity to talk to him because he represents the players and the meeting was very positive. I am confident we can reach an agreement.
"Federer is at a point in his career in which he prioritises the most important tournaments. I have talked with his people and I have not closed any doors."
22. Januar 2019
|Henry´s Monaco dumped out of Coupe de France|
|Qatar can win Asian Cup, says Sanchez|
|Tim Howard to retire following 2019 MLS season|
|Koscielny backs Bellerin to return from injury ´stronger than before´|
|Chiefs fire DC Bob Sutton after AFC Championship loss to Patriots|
|Reyes returns to Spain with second-tier strugglers Extremadura|
|Emiliano Sala: Profile of Cardiff City striker missing after joining from Nantes|
|Messi rested for Sevilla trip, Boateng set for debut|
|Nuno fined over pitch celebration in Leicester win|
|Nadal unfazed by another Next Gen opponent in Tsitsipas|
|Ulster hand lifetime ban to spectator after Zebo abuse|
|Phehlukwayo´s career-best day inspires Proteas against Pakistan|
|Bournemouth pounce for Brentford´s Mepham|
|You say all signings are controversial – Valverde defends Boateng arrival|
|Search for missing Sala plane suspended|
|Kohli and Williamson display mutual respect as India and Black Caps prepare for battle|
|Qatar 1 Iraq 0: Al Rawi free-kick books quarter-final spot|
|Ba joins Adebayor and Robinho at Istanbul Basaksehir|
|BREAKING NEWS: Tottenham´s Alli out until March with hamstring injury|
|Fit-again Joseph added to England squad|
|It is very, very serious for us - Tuchel wants midfielder in January window|
|Lakers expect Rajon Rondo back Thursday as LeBron James continues rehab|
|Atletico Madrid boosted as Koke thigh injury revealed to be minor|
|South Korea 2 Bahrain 1 (after extra time): Kim Jin-su seals quarter-final spot|
|AC Milan confirm Zapata thigh injury|
|I miss him a lot - Guardiola confirms ´clever´ Mendy back in Man City squad|
|Tiafoe wants LeBron meeting after run to Australian Open quarters|
|Cardiff continue to ´pray´ for Sala|
|West Ham fined over Burnley clash chaos|
|Knicks star Enes Kanter frustrated by reduced role|
|Kvitova getting back to her best, says Barty|
|Kvitova revels in first semi of ´second career´|
|Messi´s the best player in every world – Boateng dismisses past Real Madrid comments|
|Thunder frustrations continue against Renegades|
|Alonso vows to clear name in tax fraud case|
|Classy Nadal downs Tiafoe to set up Tsitsipas semi|
|Hoedt leaves Southampton for Celta Vigo on loan|
|Melbourne City 4 Western Sydney Wanderers 3: Hosts edge thriller with two goals in last six minutes|
|Wilder won´t even pick up the phone - Hearn not hopeful of AJ bout|
|Sala was on board missing plane, say French authorities|
|Arsenal´s Bellerin out for season with ACL rupture|
|Gatland waiting on ´concrete´ offers|
|Ronaldo accepts prison sentence and €18.8m fine for tax fraud|
|Tsitsipas: It was vital to back up Federer win|
|Awesome Kvitova ends Barty´s home run in Melbourne|
|CA rejects Thunder appeal for full points in abandoned Heat clash|
|Emiliano Sala: Concerns grow for Cardiff striker after plane goes missing|
|Harden unimpressed with refs in Rockets´ 76ers disappointment|
|Ronaldo arrives for sentencing in tax fraud case|
|Record-breaking evening ´one of those nights´ for Warriors star Thompson|
|Hazard still interested in Real Madrid but won´t rule out Chelsea stay|
|Collins moves past Pavlyuchenkova, into Australian Open semis|
|Kohli makes history with ICC awards sweep|
|Thompson sets NBA record with 10 straight made three-pointers to open game|
|76ers hand Rockets largest loss of season, Harden scores 37 points|
|Tsitsipas overcomes Bautista Agut to continue Aus Open run|
|Barcelona move a ´dream come true´ for Boateng|
|Rams coach McVay on Gurley: I´ve got to get him more opportunities|
|Butler´s sprained wrist not expected to keep him out ´long term´|
|Saints owner Benson will ´aggressively pursue changes in NFL policies´|
|Levante to take Copa case to CAS|
|It can happen – Allegri plays down Ronaldo penalty miss|
|Mavericks´ Doncic becomes second-youngest player to record triple-double|
|Yankees send Sonny Gray to Reds|
|Ashley Cole reunited with Frank Lampard at Derby County|
|Arnold ready to mix things up in 2019 Asian Cup quarter-finals|
|Arum: Joshua desperately needs to fight in the United States|
21. Januar 2019
|South Korea v Bahrain: Bento optimistic of continuing unblemished campaign|
|Bolton Wanderers 0 West Brom 2: Baggies bounce up to third after tennis ball protest|
|Confident Moeen ready to shine for England in the Caribbean|