Yorkshire have pulled four players out of Monday night's Vitality Blast match against Lancashire at Headingley due to concerns over coronavirus.
The North Group Roses game is scheduled for a 6.15pm start and Yorkshire announced on Twitter that the quartet, including David Willey and Tom Kohler-Cadmore, will not take part.
Yorkshire said: "Matthew Fisher, Tom Kohler-Cadmore, Josh Poysden and David Willey have been withdrawn from tonight's squad in accordance with COVID guidance.
Matthew Fisher, Tom Kohler-Cadmore, Josh Poysden and David Willey have been withdrawn from tonight's squad in accordance with COVID guidance. The Club are awaiting results of a COVID test which will determine future availability. — Yorkshire CCC (@YorkshireCCC) September 14, 2020
"The club are awaiting results of a COVID test which will determine future availability."
Yorkshire are bidding for their third Vitality Blast win of the season in a bid to keep their hopes of qualifying for the quarter-finals alive.
Willey and Kohler-Cadmore have both captained the side in the competition this season, while Fisher (eight wickets), Willey and Poysden (both five) are the county's three leading wicket-takers.
Lancashire are currently second in the table having lost only one of their first four matches.
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