The Kremlin has said US national security adviser John Bolton plans to visit Moscow, without providing details about the trip.
Despite being banned from all football-related activity for another three and a half years, there Blatter was watching Ronaldo light up the Luzhniki Stadium with his fourth goal of the tournament.
The Swiss denied his presence at the World Cup would embarrass his successor, Gianni Infantino.
"Today I saw Infantino and Blatter at the stadium, it's true", TASS quoted Sorokin as saying.
He has previously suggested there was an agreement in place for Russian Federation to host the 2018 World Cup - before the vote took place. "But I'm a guest, and I enjoyed the first match I have watched".
The Kremlin said Tuesday there are no plans for a meeting between Trump and Putin before the North Atlantic Treaty Organisation summit, Interfax reported.More news: John Bolton: Leaving the Human Rights Council was 'decades in the making'
"I had the impression it was my World Cup ... that time has not stopped since I went to the last one in Brazil", he said, smiling. "I'm still president, but suspended", he told Russian news channel RT.
"I think it would be easier for them to bring at least three associations together because with 48 teams it will not be so easy".
"It is good to be a fan", Blatter said before posing for photographs with the laminated Fan ID card.
Blatter, who has repeatedly denied any wrongdoing, said on Thursday he had been invited to the World Cup by Russian Federation, which he said had organised his trip and provided him with tickets and a fan ID.
When asked how he had been occupying his time since the ban, Blatter said he was grappling with how to solve the problem of political intervention in world football.
Sepp Blatter has said he will use his "influence" to help a British bid win the right to stage the 2030 World Cup, providing his help is wanted.