The Sportsbet customer waited exactly two weeks after the 2018 Melbourne Cup had run before laying down their hard-earned cash on this year's victor, Vow and Declare.
There had been little tempo in the race before the final 1000 metres as Twilight Payment led into the straight, but once they turned for home the contenders spread out across the track for the run to the post.
One of the most inexperienced horses in the Cup, Vow And Declare defeated Irish stayer Master Of Reality with English-trained Prince Of Arran finishing third.
Prince Of Arran's trainer Charlie Felllowes has said in the past horses ridden by jockeys who break the whip rules should be disqualified, not just suspended.
Fourth-placed Il Paradiso copped interference from second-placed Master Of Reality as the two horses battled for a superior position in the final moments of the race.More news: RNC paid $60K for President Trump and guests to attend UFC 244
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Joseph O'Brien won the 2017 Melbourne Cup with Rekindling and he was disappointed Master Of Reality could not give Dettori his first win in the race, with the Italian having twice finished second in 1999 and 2015.
"In June, PETA revealed that some 3,000 Australian horses and their offspring had been cast off by the racing industry and killed for meat in South Korea".
Dettori partnered the Lloyd and Nick Williams-owned, Joseph O'Brien-trained Master Of Reality who was beaten a head by Vow And And Declare in Tuesday's race.
The Lindsay Park-trained galloper bottomed out to finish in last place in the Flemington feature, and jockey Dwayne Dunn knew something was amiss with the galloper shortly after the race.
The protest had no impact on the victor of the race Vow and Declare.