Newmarket vets to investigate Sprinter Sacre heart problem as career hangs in balance Reasons why such an affliction should bring a magnificently-fit physical specimen to a juddering halt before a whip had even been lifted are not going to be easy to find. There was no warning, as Geraghty so eloquently reported. "Everything you do on Sprinter Sacre is 'whoa, whoa, whoa," and all of a sudden, there was no 'whoa," Something was amiss and I wasn't going to hang around to find out what it was. I pulled him up. Hopefully, it's only a temporary thing. Mould, who owns Sprinter Sacre with his wife Caroline, added: "I believe Denman had something similar and he was able to come back and win a second Hennessy. We certainly hope it is not the end. Before the race Henderson said that he was dreading yesterday's comeback but that was because of fears of very soft, testing ground, not any undue worry about the horse's health. Also, he felt the horse he often calls 'The Big Black Aeroplane" would be at his most vulnerable early in the campaign, but nobody can have envisaged such an anticlimax. The 8,000 crowd were deflated in an instant. Because of concern for Sprinter Sacre, many will not have appreciated Sire De Grugy's fine winning performance. He was getting tired but had been in front from a long way out. Rider Jamie Moore kept pushing all the way to the line aboard the seven-year-old, who beat Oiseau De Nuit by four lengths, with 26 lengths back to Astracad in third. It was a triumph for trainer Gary Moore, who was quick to point out that his son had been unable to ride the race he had intended. Jamie didn't want to be in front that early, but knew something had gone wrong. I'm hoping our horse has not had too hard a race as we want to go for the Clarence House Chase at Ascot [Jan 18]. You haven't seen the best of him today. It was a messy race, and he has had nothing to carry him there," said Moore. The trainer admitted that Kempton's move to boost the prize money to £80,000 had influenced his decision to run, but not, perhaps, as much as weather patterns that have threatened racing in Ireland. Henderson has endured a string of recent disappointments but moves on to Leopardstown today, hoping Bobs Worth, his Gold Cup winner last March, can turn the tide by taking the Lexus Chase.