Official site of the England and Wales Cricket Board
Hampshire take a weakened bowling attack to Taunton as they seek to bounce back from their innings defeat by Yorkshire in LV County Championship Division One.
Shane Bond has picked up a calf injury, Chris Tremlett is on England Lions duty and captain Dimitri Mascarenhas is still with the Rajasthan Royals in the Indian Premier League.
Another fast bowler, David Balcombe, recovered from an initial injury but suffered a further side strain at the weekend.
The absentees mean that David Griffiths will lead Hampshire’s attack, supported by left-armer James Tomlinson, and either Hamza Riazuddin or left-arm spinner Liam Dawson.
Riazuddin, 18, is still at Bradfield College and yet to make his first-class debut, but took eight wickets against Sussex second XI at Hove in April.
Dawson has represented England Under-19s, but did not have a chance to bowl on his championship debut, away at Yorkshire last season.
The county will also be without opening batsman Michael Carberry, away with the Lions, but his loss is offset by the return of England batsman Kevin Pietersen, who plays his first championship match of the season.
Zimbabwean all-rounder Sean Ervine has fully recovered from his hamstring injury and also returns.
A neck injury continues to keep Andrew Caddick out of the Somerset squad.
The former England fast bowler has played only once for his county this season, in a three-day match against Cambridge UCCE in April.
Fast bowler Mark Turner is also absent with a niggle, and his place is expected to be taken by Alfonso Thomas.
Thomas and fellow South African Zander de Bruyn are also named in a 13-man squad and are expected to make their championship debuts for Somerset.
Opening batsman John Francis has not retained his place from the XI that drew with Lancashire in their last championship game. His place could be taken by Neil Edwards.
Want to start playing cricket - or re-kindle your playing days?
Get all the latest features, news and action
Only a year and the Aussies are here - here's all the info you need
All the contact information and links to help you buy match tickets
Contact ECB by email, phone or fax - or feedback via ecb.co.uk
Want to watch some cricket? Find the matches you want to see
Get our news and scores feeds via RSS to your desktop or mobile
Enjoy our blogs, right across the cricketing spectrum, from players to volunteers
ECB publications for you to download as PDFs, plus other resources
Official site of the England and Wales Cricket Board