Upset British fans are blaming it on Prime Minister David Cameron, claiming the whenever he has shown up to watch matches so far in the ongoing Olympics, the team Great Britain has lost.
Cameron was urged to give the rest of the Olympics a miss after jinxing a second British medal hope yesterday, British newspaper Mirror reported today.
The prime minister took the tube to Stratford to cheer on Tom Daley and Peter Waterfield as they went for gold in the synchronised diving.
The pair were leading the field until the TV cameras picked out Cameron in the crowd, grinning from the cheap seats.
They went on to blow their chances with a messy dive which left them finishing fourth, just missing out on the medals.
The disappointment was the second witnessed by the PM during the Games, sparking jibes about the "curse of Cameron", the report said.
He also turned out to support British cycling hero Mark Cavendish, who was favourite for gold in Saturday's men's road race but ended up finishing 29th.
Cameron was also at Wimbledon a few weeks ago to see Andy Murray throw away a lead against Roger Federer. And the PM was left red faced when he watched England get beaten by Germany in the 2010 World Cup alongside Chancellor Angela Merkel at a G8 meeting in Canada.
Last night the Curse of Cameron had not escaped the notice of Twitter users.
Several people went on the website to brand Cameron a jinx and urge him not to watch other British medal hopefuls in the wake of Daley and Waterfield's fourth place finish.
One, Jim White, said: "David Cameron watching Tom Daley, after being at cycling on Saturday. His desperate effort to associate with gold is turning into a curse..."
Mike Forster said: "I blame David Cameron #jinx."
Nick Barlow said: "David Cameron: please keep your medal jinx away from the Hampton Court area on Wednesday."
But the pleas to stay away fell on deaf ears with a spokesman for the prime minister insisting that he will continue to support British competitors whether they like it or not.
The spokesman said: "Like everyone else, he likes to show his support for British teams, whatever the sport may be."