Spain coach Vicente Del Bosque has indicated that there are major doubts over Diego Costa's participation in the World Cup, but said Fernando Torres was well placed to make the final squad.

Brazil-born striker Costa had seemed certain to be named, but his recent hamstring problems continued when he was substituted after only eight minutes of Saturday's 4-1 Champions League final defeat to Real Madrid.

He had been taken off injured in the 1-1 draw at Barcelona that clinched the La Liga title but was named in Diego Simeone's starting XI for the Champions League clash after receiving treatment in Belgrade.

On Monday, Dr. Pedro Guillen of the Madrid general hospital CEMTRO clinic told COPE radio that Costa had been in for tests on Monday and was still suffering from the hamstring tear which Atletico's doctors had confirmed last week.

"Diego Costa is still injured, he has a micro-tear in a hamstring," Guillen said. "He needs at least two weeks of rest."

Del Bosque did not name any Atletico or Madrid players in his 19-man squad for Friday's warm-up friendly against Bolivia in Seville, but stressed to AS that he did not plan to include any players who were less than 100 percent fit in the final squad.