Arsenal's Spanish midfielder, Cesc Fabregas, was injured in a match with Barcelona in March. ((Adrian Dennis/Getty Images))

Spain's coach Vicente del Bosque is confident his three injured stars will be fit for the World Cup and he sees anything other than lifting the tournament trophy in July as a failure.

Fernando Torres is on crutches and recovering from knee surgery, while Cesc Fabregas is out with a broken right leg and Andres Iniesta has been hampered by leg muscle problems.

With the World Cup beginning on June 11 and the final squad to be announced by June 1, there has been concern in Spain that one or more of the trio will not be fit in time.

However, Del Bosque said at a sports forum in Madrid on Tuesday that he expects all three players to have fully recovered by the time the tournament begins.

"We trust that these players will be 100 per cent by [the World Cup]," said the former Real Madrid coach.

He added that not winning the World Cup would constitute failure for his European champions.

Del Bosque accepted Spain's status as favourite going into the tournament, although he identified England, Argentina and Brazil as the main threats to his side.

While he said he was confident about Spain's talent and mental strength, one of Del Bosque's biggest concerns was the draining effect of the Spanish domestic league, which ends on May 16.

"We have enough enthusiasm, but we also need enough physical reserves," he said.