UEFA is reviewing whether to suspend the Champions League and Europa League due to coronavirus.
Senior figures want the competitions suspended with the virus beginning to affect a number of the teams involved.
Real Madrid were scheduled to face Manchester City at the Etihad in the second leg of their Champions League last-16 tie on Tuesday, but the fixture now looks unlikely with their first-team squad placed in quarantine.
The players will self-isolate for 15 days after a member of the Spanish club’s basketball team, who they share a training ground with, tested positive for the coronavirus.
Juventus confirmed on Wednesday that defender Daniele Rugani has tested positive for coronavirus. They were also set to play in the Champions League on Tuesday, against Lyon in Turin.
Wolves are in Greece to play Olympiakos on Thursday evening in the first leg of their round-of-16 tie behind closed doors after UEFA rejected their request to postpone the fixture amid heightened coronavirus fears.
The Premier League club insisted the game poses an “unnecessary risk” as cases rise across Europe, and after the Olympiakos owner Evangelos Marinakis was diagnosed with coronavirus.
Manchester United are also scheduled to play on Thursday evening, against LASK in Austria behind closed doors.
Rangers are in action against Bayer Leverkusen, with ticket holders being allowed in to watch the game. It has already been confirmed that the return leg in Germany on March 19 will take place behind closed doors.