Aidan O'Brien's Greatwallofchina finished a disappointing last of three in the feature race at Limerick.
Having featured in the Prix Jean-Luc Lagardere and the Dewhurst at the end of last season, the Kingmambo colt was expected to have no trouble opening his account in the Irish Stallion Farms EBF Race.
However, despite being sent off the 8-11 favourite, and being in receipt of 4lb, he trailed home behind Mr Medici and Provincial.
Kevin Prendergast's Mr Medici was not beaten far behind 2000 Guineas fancy Jupiter Pluvius on his final start as a juvenile but was still sent off as a 9-4 chance.
Declan McDonogh always looked comfortable on the son of Medicean, who was driven out for a four-length win.
"We have always liked this horse," said McDonogh.
"He disappointed at Dundalk (when he was a short-priced favourite) but he appreciates the give in the ground and he is the type of horse who may travel and win a decent race somewhere abroad."
Enda Kelly's Manhattan Beach (4-1) confirmed the promise of her debut second at the Curragh last week with a solid display in the Irish Stallion Farms EBF Fund Fillies Maiden.
Runner-up behind O'Brien's Georgebernardshaw last Sunday, the Captain Rio filly relished the testing underfoot conditions like her father did in the past.
Niall McCullagh brought his mount home three-quarters of a length clear of 7-2 joint-favourite House Rebel.
David Marnane's Dubburg made nearly every yard of the running to win the Tote Placepot Races 1 to 6 Maiden.
The 11-2 shot was given a positive ride by Fran Berry and he barely saw another rival in the six-and-a-half furlong contest.
The Johannesburg colt had two and a half lengths in hand at the line over Fast Hanna.
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