SAO PAULO (AP) ― FIFA Secretary-General Jerome Valcke expressed his concern about three of the 12 World Cup stadiums during his final inspection of host cities.

During a two-week trip that ended on Thursday, Valcke sent warnings to organizers in Natal, Porto Alegre and Sao Paulo, which will host the World Cup’s opening match in two weeks.

He said it was a “race against the clock” in Natal and there was a lot “yet to be done” in Porto Alegre. In Sao Paulo, FIFA requested a second test event at the delayed Itaquerao Stadium that will host the Brazil-Croatia opener on June 12.

Valcke said he was pleased with the work underway in the other nine host cities, including Curitiba, which earlier this year was nearly excluded from the tournament because of chronic delays.

Valcke’s final stop on Thursday was in the northeastern city of Salvador, where he said there was “no time to waste” but praised the commitment of local organizers to make sure everything will be ready in time.

The game in Salvador on June 13 will be a much-anticipated rematch of the 2010 final, when Spain beat the Netherlands for the title in South Africa.

“All must be perfect that day,” Valcke said on Twitter. “Pleased with Salvador’s commitment to work with our on-site team to finalize remaining works for fans, media & teams.”

Also Thursday, Salvador officials announced they reached a deal guaranteeing the organization of its fanfest, the FIFA-required event that allows fans to watch matches on large screens for free in public areas.

Salvador had been among the cities yet to announce its plans for the event. Another was Recife, which Valcke also visited on Thursday.

Organizers there said they were still looking for private partners to promote the event without having to spend public money.

Valcke said he was pleased with the work at Recife’s Arena Pernambuco, saying it was “on track for hosting” matches.

“Installations are taking shape really well here,” he said.

The Arena Pernambuco was one the six stadiums built for last year‘s Confederations Cup, the World Cup warm-up tournament. FIFA wanted the other six venues completed by the end of 2013, but none met the deadline.

One of the stadiums that wasn’t ready in time was the Arena das Dunas in Natal, which Valcke visited on Wednesday.

“Still lots to be done for (hash)World Cup fans & media,” he said. “We need full commitment from all parties in Natal to ensure all will be in place & tested.”

Last week, he posted: “We cannot waste a single minute” in Porto Alegre “otherwise the quality for fans & broadcasters will be jeopardized during the (hash) World Cup.”

In Sao Paulo, Valcke warned that it was “vital” another test event was scheduled to help ensure problems can be avoided during the high-profile opening match.