Durham all-rounder Ben Stokes faces a lay-off off between six to eight weeks after badly dislocating his finger against Lancashire on Tuesday.
The 19-year-old's right index finger was damaged as he tried to take a catch from Lancashire's Paul Horton during their second innings.
X-rays have revealed joint damage, a piece of bone fragmented and will require surgery to be pinned.
Stokes has been in impressive form, recording four hundreds this season.
The England Lions player was also involved in a record stand of 331 with team-mate Dale Benkenstein, ending on a personal best 185.