Yeats Reported Stiff After Working Friday Vodaphone Derby favourite Yeats has had an injury scare just two weeks before the Epsom showpiece.Aidan O'Brien said on Saturday that he would 'monitor the situation' after the colt was found to be 'a shade stiff' 24 hours after working on Friday morning.O'Brien said of Yeats, who is as short as 9-4 with Ladbrokes for the classic: 'He worked at home on Friday and was stiff for some reason this morning. It´s probably a thing of nothing and is not unusual - he could have just tweaked a muscle. It´s never happened before and we´ll monitor the situation, but he has done everything he was supposed to do so far.'The trainer, whose miserable run in Classics this year continued yesterday when Grand Reward could finish only fifth in the Irish 2,000 Guineas.
