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."
16. November 2018
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|Root leads from the front as aggressive England assume control|
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|Pakistan rip through Black Caps in Abu Dhabi|
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|Van Dijk leadership essential for Liverpool – Wijnaldum|
|Dalic: Croatia´s bench was ready to stop Spain!|
|Sublime Root century gives England imposing lead|
|Vinicius appreciates Solari influence at Real Madrid|
|Havertz would suit Bayern Munich – Kimmich|
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|Ranieri targets defensive improvements at failing Fulham|
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|Witsel: Joining Borussia Dortmund my best career decision|
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|Rockets rout Warriors as Green goes scoreless|
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|Smith, Warner set to return to IPL in 2019|
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|Neymar: Emery will bring success to Arsenal|
|Jedvaj backs Croatia to deliver against England|
|Howell grabs first-round lead at Sea Island|
|Rooney backing Kane to break England record|
|Betts named American League MVP|
|Republic of Ireland must improve, says under-pressure O´Neill|
|Injured Sergio Ramos to leave Spain squad|
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|Low praises ´beautiful goals´ from Sane and Gnabry|
|Belgium boss Martinez pleased with patient Batshuayi|
|Wilson and Sancho pay tribute to England ´legend´ Rooney|
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15. November 2018
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|Black Caps skipper Williamson confident over first Test availability|
|Federer cruises into last four of ATP Finals for 15th time|
|Republic of Ireland 0 Northern Ireland 0: Randolph saves light up bore draw|
|England 3 United States 0: Experimental side impresses on Rooney farewell|
|Croatia 3 Spain 2: Jedvaj keeps World Cup finalists in contention|
|Belgium 2 Iceland 0: Batshuayi rekindles Hazard flame with match-winning brace|