Australian Nathan Bracken makes his Championship debut for Gloucestershire as they seek a win which could secure their Division One status.
They take on Sussex with Bracken replacing Roger Sillence and Tim Hancock preferred to Martyn Ball.
Sussex have named a 13-man squad for the trip west after a home defeat by Middlesex ended their title hopes.
Luke Wright, Mark Davis and Jason Lewry come into contention, but Michael Yardy has been left out.
A number of Sussex players have personal targets in their sights.
If selected, all-rounder Robin Martin-Jenkins will be making his 100th Championship appearance.
Skipper Chris Adams and Richard Montgomerie, meanwhile, need 87 and 22 runs respectively to reach 1,000 in first-class cricket this summer, and Mohammad Akram is only four short of the 50 wickets mark.
For Gloucestershire, 23 points from their last two games will ensure they do not return to the Second Division.
"A couple of good draws will do us. However, we will approach the Sussex game like any other one and go out trying to win," player-coach Mark Alleyne told the club's website.
Gloucestershire: C Taylor (capt), C Spearman, P Weston, M Hussey, T Hancock, A Gidman, S Adshead, I Fisher, J Lewis, J Averis, N Bracken.
Sussex (from): C Adams (capt), I Ward, R Montgomerie, T Cottey, M Goodwin, M Prior (wkt), R Martin-Jenkins, M Davis, L Wright, Mushtaq Ahmed, J Kirtley, J Lewry, Mohammad Akram.
They take on Sussex with Bracken replacing Roger Sillence and Tim Hancock preferred to Martyn Ball.
Sussex have named a 13-man squad for the trip west after a home defeat by Middlesex ended their title hopes.
Luke Wright, Mark Davis and Jason Lewry come into contention, but Michael Yardy has been left out.
A number of Sussex players have personal targets in their sights.
If selected, all-rounder Robin Martin-Jenkins will be making his 100th Championship appearance.
Skipper Chris Adams and Richard Montgomerie, meanwhile, need 87 and 22 runs respectively to reach 1,000 in first-class cricket this summer, and Mohammad Akram is only four short of the 50 wickets mark.
For Gloucestershire, 23 points from their last two games will ensure they do not return to the Second Division.
"A couple of good draws will do us. However, we will approach the Sussex game like any other one and go out trying to win," player-coach Mark Alleyne told the club's website.
Gloucestershire: C Taylor (capt), C Spearman, P Weston, M Hussey, T Hancock, A Gidman, S Adshead, I Fisher, J Lewis, J Averis, N Bracken.
Sussex (from): C Adams (capt), I Ward, R Montgomerie, T Cottey, M Goodwin, M Prior (wkt), R Martin-Jenkins, M Davis, L Wright, Mushtaq Ahmed, J Kirtley, J Lewry, Mohammad Akram.
