The second leg of Manchester City's last-16 second leg Champions League tie against Real Madrid, scheduled for Tuesday 17 March, has been postponed.
The decision, confirmed by Uefa, comes after the Real Madrid squad went into quarantine because of coronavirus.
The second leg of Juventus' last-16 tie against Lyon has also been postponed on the same date.
Juve's squad will spend two weeks in quarantine after defender Daniele Rugani tested positive for the virus.
On Thursday the Italian giants said 121 people, including football players, staff members, directors, entourage and Juventus employees are "observing a period of voluntary home isolation, in compliance with the requirements of the health authorities based on the provisions currently in force".
A Uefa statement said: "Following the quarantine imposed on players of Juventus and Real Madrid, the matches will not take place as scheduled."
City's Premier League game with Arsenal was postponed on Wednesday as a precautionary measure.
Pep Guardiola's side hold a 2-1 lead from the first leg against Real in Spain on 26 February, while Juventus trail Lyon 1-0 after the first leg in France.