Nottingham Forest have cancelled Wednesday's behind-closed-doors friendly with Aston Villa following positive Covid-19 cases at the Championship club.
"This was the only decision that could be made in the circumstances to protect the welfare of players and staff," Forest boss Chris Hughton said.
"I would like to thank Dean Smith and Aston Villa for their understanding."
The Covid cases were identified as part of Forest's on-going testing programme - and those affected are now self isolating.
Forest are due to kick off their new season with a trip to Coventry on Sunday, 8 August, although before then they have a friendly with Burnley at the City Ground on Saturday, which will now have to be considered.