Worcestershire Rapids NatWest T20 Blast Quarter-Final with Hampshire at New Road on August 14 is on the verge of being a sell-out.
Just under 100 of the 5,000 tickets remain unsold for the County's first ever home quarter-final in the competition.
Interest has been high in the game since tickets first went on sale to members 11 days ago as part of a four-day priority window.
Any remaining tickets then went on sale to the general public a week ago.
Worcestershire Ticketing and Membership Manager Amy Francetti said: "The way things are going it will not be long before the 'sold out' signs are being displayed.
"The message is if you want to see the game book as soon as possible to avoid missing out on our first ever home T20 quarter-final. We'd hate to see anyone disappointed.
"There has been a lot of interest ever since tickets first went on sale and a steady stream of sales.
"You can sense everyone is full of excitement and the game is now only one week away."