Don Alberto Stable’s Forza Di Oro gets the honors of morning line favorite at 7-2 in the $100,000 Tenacious Stakes Monday at Fair Grounds, but last year’s Tenacious exacta returns in the form of Estate of James J. Coleman Jr.’s Chess Chief and Lothenbach’s Happy American, who is cross-entered in the $100,000 Buddy Diliberto three races earlier on the card.