Fallon is only the third British man to win a World judo title
Former world judo champion Craig Fallon will not be able make his return to international competition this weekend because of an ankle injury.
Fallon had planned to represent Great Britain at the Budapest World Cup for the first time since taking a two-year break from competition.
The 28-year-old was to have moved up a weight category from -60kg to -66kg but suffered the injury during training.
"We very much look forward to his return," a GB spokesperson said.
The 2005 world champion last represented Great Britain at the Beijing Olympics in 2008, where he had been hotly tipped for a medal. However, a disappointing performance led him to take a sabbatical from the sport.
Fallon made self-funded trips to last year's Swedish European Cup and Finnish Open but he only returned to the Great Britain fold at the trials in January.
We have entered the Intensification Phase of the programme with 18 months left to the Olympic Game
British Judo Performance Director
The Camberley-based judoka chose to fight at the half-lightweight division and his performance earned him selection for the World Cup event in Budapest which, it is hoped, will be his first step on the road to the London 2012 Olympics.
Fallon is one of only two British competitors ever to hold simultaneous world and European judo titles.
Other British judokas aiming for success in Hungary include European Under-23 champion Ashley Mackenzie and Tom Davis, who won gold at the British Senior Trials.
British Judo performance director Margaret Hicks said: "We have entered the Intensification Phase of the programme with 18 months left to the Olympic Games. For a number of players, the plan is geared toward performance at the European Championships in April and of course the World Championships in Paris in August."