Singapore Airlines International Cup
At the end of his racing career, Zagreb was exported to stand as a breeding stallion in Japan. He returned to Ireland a few years later where he was based at the Beechbrook Stud at Tinahely, County Wicklow. The best of his Japanese offspring was Cosmo Bulk who won the Singapore Airlines International Cup in 2006, whilst another of his sons, Cosmo Sunbeam, won Asahi Hai Futurity Stakes in 2003. In Ireland he was mainly used as a National Hunt sire.