Sire De Grugy has given trainer Gary Moore and his jockey son Jamie a milestone Grade One win in the Tingle Creek Chase at Sandown.
The two are normally overshadowed by Jamie's sibling Ryan, a multiple champion Flat rider in Britain.
Gary Moore believed the Tingle Creek at Sandown was Sire De Grugy's best chance of a Grade One win and the absence of Sprinter Sacre made it easier.
But the tricky fences along the back straight still stood in their way and Moore's son Jamie was put to the test.
Sire De Grugy's superior cruising speed and determination prevented him from being boxed in and a storming leap at the last helped him hold off the staying-on Somersby by four lengths.
A typically inexpensive purchase by the Moore family, who are steady fixtures on the smaller southern tracks, Sire De Grugy was given a welcome from a crowd appreciative of a major victory for one of the less fashionable combinations.
"It means the world, it's what you get up for, and it just goes to show it doesn't matter what you pay for them, it doesn't always make them," Gary Moore said.
"A lot of top people passed him over but a lot of credit must go to Jamie, as he went and saw him and said 'you've got to buy this horse as soon as you can."
Sprinter Sacre could make his belated reappearance in the Desert Orchid Chase at Kempton over Christmas and Moore believes it would be his only chance of beating the National Hunt great.
"I'm going to have to take him on at some point and I'd rather it was at Kempton (Desert Orchid Chase, December 27)," he said.
"If I want to swerve him I can go to Leopardstown, but I'd say he'll go to Kempton."
His son Jamie said it was his greatest racing moment.
"I'm delighted for my dad," he said.
"For me personally it is my best achievement, there was a bit of pressure as we love him to pieces."