Middlesex bowler Toby Roland-Jones faces a lengthy spell out with a knee injury.
The former England international, 33, has had surgery to repair a cartilage tear he suffered earlier this week.
He recently returned to action for the first time since September 2019 after a long absence with a shoulder problem.
“This is horrible news for Toby,” said Middlesex head coach Stuart Law.
“It is really unfortunate to lose a player of Toby’s ability and presence both on and off the field.
“We hope the post-surgery news is positive but his absence does create opportunities for other players to shine. We all wish him a speedy recovery.”