Colin Montgomerie believes money would be the only reason to play the Ryder Cup this year, if it proves impossible to stage it without fans.
Rory McIlroy has questioned whether the Ryder Cup can go ahead this year and believes the event will be postponed until 2021.
Ryder Cup captain Padraig Harrington was left embarrassed after accidentally revealing one of his vice-captains for the 2020 contest live on The Golf Show.
Padraig Harrington will not be picking his entire Ryder Cup team and insisted he was preparing to play behind closed doors in Wisconsin.
Jon Rahm has echoed the sentiments of Rory McIlroy and Brooks Koepka by insisting the Ryder Cup should not go ahead without spectators in September.
European Ryder Cup captain Padraig Harrington says playing this year's edition without fans would deny players the opportunity of becoming a "hero".
USA captain Steve Stricker conceded that Europe's dominance of the Ryder Cup this century is a concern ahead of the 2020 contest.