Millwall's trip to Nottingham Forest on Saturday 5th August, the opening day of the 2017/18 Sky Bet Championship season, is likely to be moved.
Trent Bridge, located close to The City Ground, is hosting a 20/20 cricket competition on the same day.
The Lions are in ongoing discussions with Forest about a potential new date and kick-off time and will provide an update early next week.
For now the club advises supporters against booking any travel plans until a rearranged date is confirmed.