07/27/2012 08:42 EDT | Updated 09/26/2012 05:12 EDT

CAS to rule Saturday on Irish Olympics selection dispute in equestrian jumping

LONDON - The Court of Arbitration for Sport says it expects to rule on a selection dispute in Ireland's Olympics equestrian team on Saturday.

CAS says rider Denis Lynch has challenged Horse Sport Ireland's nomination of Cian O'Connor in a two-rider team in individual jumping. The competition begins Aug. 4 at Greenwich Park.

Lynch was originally selected then withdrawn after his horse, Lantinus, was disqualified from a recent event on health grounds.

O'Connor won gold in show jumping at the 2004 Athens Olympics but was stripped of his medal after his horse tested positive for a banned substance.

Lynch and Lantinus were disqualified at the 2008 Beijing Olympics for using a banned medication.

Lynch's appeal is the third case registered by CAS at its Olympics court.