Gerard Pique believes the Davis Cup Finals, which is scheduled for November 23-29 in Madrid, could fall victim to the coronavirus.
Ecuador defeated Japan, who were without Kei Nishikori and Yoshihito Nishioka, to book their place in the Davis Cup finals.
India will take on Croatia in Zagreb in the Davis Cup Qualifiers.
Rafael Nadal and Bautista Agut won their matches to help Spain beat Canada 2-0 and lift their sixth Davis Cup title.
Spain defeated Canada 2-0 with Bautista Agut and Rafael Nadal winning their matches to lift their sixth Davis Cup title.
Gerard Pique, who was at the forefront of changes made to the 119-year-old competition, said the tournament is laying the foundations for the future.
Canada trumped Russia in the semi-final as they reached the Davis Cup final for the first time.
Great Britain defeated Holland 2-1 while Rafael Nadal won his 26th straight Davis Cup singles match to help Spain reach the last eight.
Spain defeated Russia inspired by a Rafael Nadal comeback as Canada sailed int the last eight at Davis Cup Finals.
The week-long football World Cup-style Davis Cup Finals will be the biggest shake-up the 119-year-old team event has ever had
Shortly after 24-year-old Lucas Pouille, whose defeat by Marin Cilic sealed France's fate, said he was quitting the Davis Cup, Noah said the competition was disappearing in all but name.
Pierre-Hugues Herbert and Nicolas Mahut had to scrap hard to squeeze past the Croatian pair Mate Pavic and Ivan Dodig in four sets -- 6-4, 6-4, 3-6, 7-6 (7/3).
France are looking to retain the trophy when they take on Croatia at the end of the week on clay courts at the Stade Pierre Mauroy in Lille where they won last year's final against Belgium.
France won their 10th Davis Cup title when Lucas Pouille crushed Steve Darcis 6-3 6-1 6-0 to give the hosts a 3-2 victory in the final against neighbours Belgium on Sunday.
Belgium's chances of claiming a maiden Davis Cup title against hosts France remained intact after Friday's opening singles, in which David Goffin made a huge impression, were tied 1-1.
David Goffin was never in trouble as he gave visitors Belgium a 1-0 lead in the Davis Cup final against France by crushing Lucas Pouille 7-5 6-3 6-1 in the opening singles match on Friday.
Doubles specialists Nicolas Mahut and Julien Benneteau were omitted from the France team to play Belgium in the Davis Cup final starting on Friday.
The rival Davis Cup captains, Johan Van Herck of Belgium and Yannick Noah of France, avoided surprises on Tuesday as they named their teams for the final in Lille on November 24-26
Former World Cup winner Diego Maradona arrived in the Zagreb Arena amid much fanfare to support Argentina in the Davis Cup final against hosts Croatia.
Marin Cilic and Argentine Federico Delbonis will get the 2016 Davis Cup final underway in the tie's opening singles rubber on Friday, followed by a clash between Ivo Karlovic and Juan Martin Del Potro.