Recife: Rio de Janeiro's Maracana stadium is FIFA's main worry as Brazil prepares to host the Confederations Cup in June, FIFA secretary-general Jerome Valcke said on Tuesday.
Valcke visited the Arena do Copa outside Recife but said the famous Maracana, which he is due to visit Thursday, was preying on his mind.
"The city I'm travelling to in two days' is the one which is causing FIFA the most concern," he told reporters.
FIFA has said the six stadiums which will host matches in the Confederations Cup, considered a dress rehearsal for the 2014 World Cup, must be ready by mid-April.
"The date of completion is very important so we can test them before the start," Valcke said. "May is too late and that could cause a lot of trouble for FIFA, for the World Cup and for Brazil."
The Maracana, built for the 1950 World Cup and remodelled several times since, was due for completion in December but the deadline was put back to February and then April.
The latest rebuilding work started in 2010 at a cost of 900 million Reais ($457 million).