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Glamorgan welcome back England Under-19 fast bowler James Harris for the visit of Derbyshire to the SWALEC Stadium in Division Two of the LV County Championship.
Harris, who will celebrate his 18th birthday during the match, has recovered from the ankle injury which has kept him out of action all season.
He replaces fellow seamer Ryan Watkins in the only change to the team that beat Gloucestershire in their last championship outing.
The Welsh county report no other major injury concerns as they look to extend their unbeaten start to the championship season.
Derbyshire welcome back all-rounder Graham Wagg, who missed the drawn match with Warwickshire through illness.
Wicketkeeper James Pipe sustained a finger injury against Warwickshire so Dane Freddie Klokker will continue to deputise with the gloves.
Greg Smith is still absent with a thigh problem, but Jonathan Clare retains his place after signing a new one-year contract.
Official site of the England and Wales Cricket Board